10-Q 1 a19-2009_110q.htm 10-Q

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended December 31, 2018

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 000-23125

OSI SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

Delaware |  | 33-0238801
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)

12525 Chadron Avenue

Hawthorne, California 90250

(Address of principal executive offices) (Zip Code)

(310) 978-0516

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x |  | Accelerated filer o
Non-accelerated filer o |  | Smaller reporting company o
|  | Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

As of January 22, 2019, there were 18,071,408 shares of the registrant’s common stock outstanding.

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OSI SYSTEMS, INC.

INDEX

|  | PAGE
PART I — FINANCIAL INFORMATION (Unaudited) | 3
Item 1 — | Financial Statements | 3
| Condensed Consolidated Balance Sheets at June 30, 2018 and December 31, 2018 | 3
| Condensed Consolidated Statements of Operations for the three and six months ended December 31, 2017 and 2018 | 4
| Condensed Consolidated Statements of Comprehensive Income for the three and six months ended December 31, 2017 and 2018 | 5
| Condensed Consolidated Statements of Stockholders’ Equity for the six months ended December 31, 2017 and 2018 | 6
| Condensed Consolidated Statements of Cash Flows for the six months ended December 31, 2017 and 2018 | 7
| Notes to Condensed Consolidated Financial Statements | 8
Item 2 — | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 25
Item 3 — | Quantitative and Qualitative Disclosures about Market Risk | 31
Item 4 — | Controls and Procedures | 32
PART II — OTHER INFORMATION | 33
Item 1 — | Legal Proceedings | 33
Item 1A — | Risk Factors | 33
Item 2 — | Unregistered Sales of Equity Securities and Use of Proceeds | 33
Item 3 — | Defaults Upon Senior Securities | 33
Item 4 — | Mine Safety Disclosures | 33
Item 5 — | Other Information | 33
Item 6 — | Exhibits | 33
Signatures |  | 34

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PART I — FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

OSI SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(amounts in thousands, except share amounts and par value)

|  | June 30, |  | December 31, |
|  | 2018 |  | 2018 |
ASSETS |  |  |  |  |
CURRENT ASSETS: |  |  |  |  |
Cash and cash equivalents |  | $ | 84,814 |  | $ | 95,967 |
Accounts receivable, net |  | 210,744 |  | 226,086 |
Inventories |  | 313,552 |  | 315,200 |
Prepaid expenses and other current assets |  | 41,587 |  | 43,949 |
Total current assets |  | 650,697 |  | 681,202 |
Property and equipment, net |  | 115,524 |  | 121,270 |
Goodwill |  | 292,213 |  | 305,164 |
Intangible assets, net |  | 142,001 |  | 140,202 |
Other assets |  | 55,256 |  | 49,839 |
Total assets |  | $ | 1,255,691 |  | $ | 1,297,677 |
LIABILITIES AND STOCKHOLDERS’ EQUITY |  |  |  |  |
CURRENT LIABILITIES: |  |  |  |  |
Bank lines of credit |  | $ | 113,000 |  | $ | 149,000 |
Current portion of long-term debt |  | 2,262 |  | 2,107 |
Accounts payable |  | 106,892 |  | 98,339 |
Accrued payroll and related expenses |  | 40,171 |  | 36,324 |
Advances from customers |  | 55,761 |  | 69,410 |
Other accrued expenses and current liabilities |  | 125,236 |  | 114,734 |
Total current liabilities |  | 443,322 |  | 469,914 |
Long-term debt |  | 248,980 |  | 253,184 |
Deferred income taxes |  | 15,002 |  | 14,807 |
Other long-term liabilities |  | 58,951 |  | 63,576 |
Total liabilities |  | 766,255 |  | 801,481 |
Commitments and contingencies (Note 9) |  |  |  |  |
Stockholders’ Equity: |  |  |  |  |
Preferred stock, $0.001 par value —10,000,000 shares authorized; no shares issued or outstanding |  | — |  | — |
Common stock, $0.001 par value —100,000,000 shares authorized; issued and outstanding, 18,032,374 shares at June 30, 2018 and 18,020,907 shares at December 31, 2018 |  | 169,475 |  | 151,926 |
Retained earnings |  | 334,745 |  | 363,254 |
Accumulated other comprehensive loss |  | (14,784 | ) | (18,984 | )
Total stockholders’ equity |  | 489,436 |  | 496,196 |
Total liabilities and stockholders’ equity |  | $ | 1,255,691 |  | $ | 1,297,677 |

See accompanying notes to condensed consolidated financial statements.

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OSI SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(amounts in thousands, except per share data)

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Net revenues: |  |  |  |  |  |  |  |  |
Products |  | $ | 181,393 |  | $ | 225,402 |  | $ | 347,046 |  | $ | 407,882 |
Services |  | 96,135 |  | 77,803 |  | 187,615 |  | 161,572 |
Total net revenues |  | 277,528 |  | 303,205 |  | 534,661 |  | 569,454 |
Cost of goods sold: |  |  |  |  |  |  |  |  |
Products |  | 122,464 |  | 150,131 |  | 236,644 |  | 275,502 |
Services |  | 53,434 |  | 42,730 |  | 105,116 |  | 87,695 |
Total cost of goods sold |  | 175,898 |  | 192,861 |  | 341,760 |  | 363,197 |
Gross profit |  | 101,630 |  | 110,344 |  | 192,901 |  | 206,257 |
Operating expenses: |  |  |  |  |  |  |  |  |
Selling, general and administrative |  | 60,098 |  | 67,097 |  | 115,745 |  | 128,804 |
Research and development |  | 15,088 |  | 12,805 |  | 30,188 |  | 26,558 |
Impairment, restructuring and other charges |  | 8,297 |  | (1,265 | ) | 9,427 |  | 2,931 |
Total operating expenses |  | 83,483 |  | 78,637 |  | 155,360 |  | 158,293 |
Income from operations |  | 18,147 |  | 31,707 |  | 37,541 |  | 47,964 |
Interest expense and other expense, net |  | (5,282 | ) | (5,620 | ) | (9,531 | ) | (10,952 | )
Income before income taxes |  | 12,865 |  | 26,087 |  | 28,010 |  | 37,012 |
Provision for income taxes |  | (59,816 | ) | (6,980 | ) | (64,804 | ) | (8,503 | )
Net income (loss) |  | $ | (46,951 | ) | $ | 19,107 |  | $ | (36,794 | ) | $ | 28,509 |
Earnings (loss) per share: |  |  |  |  |  |  |  |  |
Basic |  | $ | (2.47 | ) | $ | 1.06 |  | $ | (1.95 | ) | $ | 1.58 |
Diluted |  | $ | (2.47 | ) | $ | 1.03 |  | $ | (1.95 | ) | $ | 1.53 |
Shares used in per share calculation: |  |  |  |  |  |  |  |  |
Basic |  | 18,971 |  | 18,085 |  | 18,874 |  | 18,088 |
Diluted |  | 18,971 |  | 18,624 |  | 18,874 |  | 18,679 |

See accompanying notes to condensed consolidated financial statements.

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OSI SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

(amounts in thousands)

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Net income (loss) |  | $ | (46,951 | ) | $ | 19,107 |  | $ | (36,794 | ) | $ | 28,509 |
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment |  | 326 |  | (5,388 | ) | 1,906 |  | (4,215 | )
Other |  | (93 | ) | 9 |  | (65 | ) | 15 |
Other comprehensive income (loss) |  | 233 |  | (5,379 | ) | 1,841 |  | (4,200 | )
Comprehensive income (loss) |  | $ | (46,718 | ) | $ | 13,728 |  | $ | (34,953 | ) | $ | 24,309 |

See accompanying notes to condensed consolidated financial statements.

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OSI SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED)

(amounts in thousands, except share data)

|  | Common |  | Accumulated Other |  |  |
|  | Number of Shares |  | Amount |  | Retained Earnings |  | Comprehensive Income (Loss) |  | Total |
Balance—June 30, 2017 |  | 18,689,568 |  | $ | 222,529 |  | $ | 363,872 |  | $ | (17,188 | ) | $ | 569,213 |
Exercise of stock options |  | 80,101 |  | 1,757 |  | — |  | — |  | 1,757 |
Vesting of RSUs |  | 372,248 |  | — |  | — |  | — |  | — |
Shares issued under employee stock purchase program |  | 37,488 |  | 1,961 |  | — |  | — |  | 1,961 |
Stock based compensation |  | — |  | 5,487 |  | — |  | — |  | 5,487 |
Taxes paid related to net share settlement of equity awards |  | (220,571 | ) | (18,803 | ) | — |  | — |  | (18,803 | )
Net income |  | — |  | — |  | 10,157 |  | — |  | 10,157 |
Other comprehensive income |  | — |  | — |  | — |  | 1,608 |  | 1,608 |
Balance—September 30, 2017 |  | 18,958,834 |  | $ | 212,931 |  | $ | 374,029 |  | $ | (15,580 | ) | $ | 571,380 |
Exercise of stock options |  | 1,654 |  | 110 |  | — |  | — |  | 110 |
Vesting of RSUs |  | 28,090 |  | — |  | — |  | — |  | — |
Stock based compensation |  | — |  | 6,253 |  | — |  | — |  | 6,253 |
Taxes paid related to net share settlement of equity awards |  | (10,547 | ) | (951 | ) | — |  | — |  | (951 | )
Net loss |  | — |  | — |  | (46,951 | ) | — |  | (46,951 | )
Other comprehensive income |  | — |  | — |  | — |  | 233 |  | 233 |
Balance—December 31, 2017 |  | 18,978,031 |  | $ | 218,343 |  | $ | 327,078 |  | $ | (15,347 | ) | $ | 530,074 |
Balance—June 30, 2018 |  | 18,032,374 |  | $ | 169,475 |  | $ | 334,745 |  | $ | (14,784 | ) | $ | 489,436 |
Exercise of stock options |  | 9,034 |  | 269 |  | — |  | — |  | 269 |
Vesting of RSUs |  | 340,082 |  | — |  | — |  | — |  | — |
Shares issued under employee stock purchase program |  | 39,293 |  | 2,020 |  | — |  | — |  | 2,020 |
Stock based compensation |  | — |  | 5,463 |  | — |  | — |  | 5,463 |
Repurchase of common stock |  | (104,146 | ) | (7,844 | ) | — |  | — |  | (7,844 | )
Taxes paid related to net share settlement of equity awards |  | (163,514 | ) | (12,623 | ) | — |  | — |  | (12,623 | )
Net income |  | — |  | — |  | 9,402 |  | — |  | 9,402 |
Other comprehensive income |  | — |  | — |  | — |  | 1,179 |  | 1,179 |
Balance—September 30, 2018 |  | 18,153,123 |  | $ | 156,760 |  | $ | 344,147 |  | $ | (13,605 | ) | $ | 487,302 |
Exercise of stock options |  | 40,361 |  | 520 |  | — |  | — |  | 520 |
Vesting of RSUs |  | 16,623 |  | — |  | — |  | — |  | — |
Stock based compensation |  | — |  | 8,163 |  | — |  | — |  | 8,163 |
Repurchase of common stock |  | (184,170 | ) | (13,185 | ) | — |  | — |  | (13,185 | )
Taxes paid related to net share settlement of equity awards |  | (5,030 | ) | (332 | ) | — |  | — |  | (332 | )
Net income |  | — |  | — |  | 19,107 |  | — |  | 19,107 |
Other comprehensive loss |  | — |  | — |  | — |  | (5,379 | ) | (5,379 | )
Balance—December 31, 2018 |  | 18,020,907 |  | $ | 151,926 |  | $ | 363,254 |  | $ | (18,984 | ) | $ | 496,196 |

See accompanying notes to condensed consolidated financial statements.

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OSI SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(amounts in thousands)

|  | For the Six Months Ended December 31, |
|  | 2017 |  | 2018 |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |  |
Net income (loss) |  | $ | (36,794 | ) | $ | 28,509 |
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |  |
Depreciation and amortization |  | 41,656 |  | 28,283 |
Stock based compensation expense |  | 11,740 |  | 13,626 |
Deferred income taxes |  | 50,696 |  | (3,308 | )
Amortization of debt discount and issuance costs |  | 4,262 |  | 4,469 |
Impairment charges |  | 3,144 |  | — |
Other |  | 885 |  | 1,015 |
Changes in operating assets and liabilities—net of business acquisitions: |  |  |  |  |
Accounts receivable |  | 12,054 |  | (13,986 | )
Inventories |  | (21,700 | ) | (2,265 | )
Prepaid expenses and other assets |  | (6,273 | ) | (5,863 | )
Accounts payable |  | (6,647 | ) | (9,166 | )
Advances from customers |  | 26,405 |  | 13,676 |
Accrued payroll and related expenses |  | 12 |  | (3,760 | )
Other |  | 5,261 |  | (10,386 | )
Net cash provided by operating activities |  | 84,701 |  | 40,844 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |  |
Acquisition of property and equipment |  | (32,009 | ) | (12,640 | )
Acquisition of businesses, net of cash acquired |  | (83,632 | ) | (18,259 | )
Acquisition of intangible and other assets |  | (1,068 | ) | (611 | )
Net cash used in investing activities |  | (116,709 | ) | (31,510 | )
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |  |  |
Net borrowings on bank lines of credit |  | 92,000 |  | 36,000 |
Proceeds from long-term debt |  | 295 |  | 817 |
Payments on long-term debt |  | (1,249 | ) | (1,233 | )
Proceeds from exercise of stock options and employee stock purchase plan |  | 3,828 |  | 2,809 |
Payments of contingent consideration |  | (804 | ) | (1,328 | )
Repurchase of common stock |  | — |  | (21,029 | )
Taxes paid related to net share settlement of equity awards |  | (19,754 | ) | (12,955 | )
Net cash provided by financing activities |  | 74,316 |  | 3,081 |
Effect of exchange rate changes on cash |  | 15 |  | (1,262 | )
Net increase in cash and cash equivalents |  | 42,323 |  | 11,153 |
Cash and cash equivalents—beginning of period |  | 169,650 |  | 84,814 |
Cash and cash equivalents—end of period |  | $ | 211,973 |  | $ | 95,967 |
Supplemental disclosure of cash flow information: |  |  |  |  |
Cash paid, net during the period for: |  |  |  |  |
Interest |  | $ | 3,783 |  | $ | 6,318 |
Income taxes |  | $ | 11,929 |  | $ | 20,711 |

See accompanying notes to condensed consolidated financial statements.

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OSI SYSTEMS, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Basis of Presentation

Description of Business

OSI Systems, Inc., together with our subsidiaries, is a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications. We sell our products in diversified markets, including homeland security, healthcare, defense and aerospace.

We have three reporting segments: (i) Security, providing security inspection systems and related services, and turnkey security screening solutions; (ii) Healthcare, providing patient monitoring, diagnostic cardiology and related services and (iii) Optoelectronics and Manufacturing, providing specialized electronic components and electronic manufacturing services for our Security and Healthcare divisions as well as to external original equipment manufacturer (“OEM”) customers and end users for applications in the defense, aerospace, medical and industrial markets, among others.

Through our Security segment, we provide security screening products and related services globally. These products fall into the following categories: baggage and parcel inspection; cargo and vehicle inspection; hold (checked) baggage screening; people screening; radiation detection; and explosive and narcotics trace detection. In addition to these products, we also provide site design, installation, training and technical support services to our customers. We also provide turnkey security screening solutions, which can include the construction, staffing and long-term operation of security screening checkpoints for our customers.

Through our Healthcare segment, we design, manufacture, market and service patient monitoring and diagnostic cardiology systems and related supplies and accessories worldwide. These products are used by care providers in critical care, emergency and perioperative areas within hospitals as well as physicians’ offices, medical clinics and ambulatory surgery centers, among others.

Through our Optoelectronics and Manufacturing segment, we design, manufacture and market optoelectronic devices and flex circuits and provide electronics manufacturing services worldwide for use in a broad range of applications, including aerospace and defense electronics, X-ray security and inspection systems and medical imaging, chemistry analysis and diagnostics instruments, telecommunications, scanners and industrial automations, automotive diagnostic systems, internet of things (IoT) and consumer wearable products. This division provides products and services to OEM customers and end users as well as to our Security and Healthcare divisions.

Basis of Presentation

The condensed consolidated financial statements include the accounts of OSI Systems, Inc. and our subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded in accordance with SEC rules and regulations applicable to interim unaudited financial statements. Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for audited financial statements. In the opinion of management, the condensed consolidated financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. These condensed consolidated financial statements and the accompanying notes should be read in conjunction with the audited consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2018. The results of operations for the six months ended December 31, 2018 are not necessarily indicative of the operating results to be expected for the full 2019 fiscal year or any future periods.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of sales and costs of sales during the reporting period. The most significant of these estimates and assumptions for our company relate to contract revenue, profit and loss recognition, fair values of assets acquired and liabilities assumed in business combinations, values for inventories reported at lower of cost or net realizable value, stock-based compensation expense, income taxes, accrued warranty costs, and the recoverability, useful lives and valuation of recorded amounts of long-lived assets, identifiable intangible assets and goodwill. Changes in estimates are reflected in the periods during which they become known. Actual amounts may differ from these estimates and could differ materially.

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Per Share Computations

We compute basic earnings per share by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. We compute diluted earnings per share by dividing net income available to common stockholders by the sum of the weighted average number of common shares and dilutive potential common shares outstanding during the period. Potential common shares consist of the shares issuable upon the exercise of stock options and restricted stock unit awards under the treasury stock method. In periods where a net loss is reported, basic and diluted net loss per share are the same since the effect of potential common shares is antidilutive and therefore excluded. The underlying equity component of the 1.25% convertible senior notes due 2022 (the “Notes”) discussed in Note 6 to the condensed consolidated financial statements will have no impact on diluted earnings per share until the average price of our common stock exceeds the conversion price because the principal amount of the Notes is intended to be settled in cash upon conversion.

The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Net income (loss) available to common stockholders |  | $ | (46,951 | ) | $ | 19,107 |  | $ | (36,794 | ) | $ | 28,509 |
Weighted average shares outstanding—basic |  | 18,971 |  | 18,085 |  | 18,874 |  | 18,088 |
Dilutive effect of equity awards |  | — |  | 539 |  | — |  | 591 |
Weighted average shares outstanding—diluted |  | 18,971 |  | 18,624 |  | 18,874 |  | 18,679 |
Basic earnings (loss) per share |  | $ | (2.47 | ) | $ | 1.06 |  | $ | (1.95 | ) | $ | 1.58 |
Diluted earnings (loss) per share |  | $ | (2.47 | ) | $ | 1.03 |  | $ | (1.95 | ) | $ | 1.53 |
Weighted average shares excluded from diluted earnings (loss) per share due to their anti-dilutive effect (in thousands) |  | 684 |  | 126 |  | 753 |  | 81 |

Cash Equivalents

We consider all highly liquid investments with maturities of three months or less as of the acquisition date to be cash equivalents.

Our cash and cash equivalents totaled $96.0 million at December 31, 2018. The majority of this amount was held by us and our subsidiaries in the United States, United Kingdom, Malaysia, India, and Mexico, and to a lesser extent in Canada, Singapore and Germany among others. We have cash holdings that exceed insured limits for financial institutions; however, we mitigate this risk by utilizing high credit quality financial institutions throughout the world.

Fair Value of Financial Instruments

Our financial instruments consist primarily of cash and cash equivalents, marketable securities, derivative instruments, accounts receivable, accounts payable and debt instruments. The carrying values of financial instruments, other than long term debt instruments, are representative of their fair values due to their short term maturities. The carrying values of our long term debt instruments are considered to approximate their fair values because the interest rates of these instruments are variable or comparable to current rates available to us.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. “Level 1” category includes assets and liabilities at quoted prices in active markets for identical assets and liabilities. “Level 2” category includes assets and liabilities from observable inputs other than quoted market prices. “Level 3” category includes assets and liabilities for which valuation techniques are unobservable and significant to the fair value measurement. As of June 30, 2018 and December 31, 2018, there were no assets where “Level 3” valuation techniques were used. Our contingent payment obligations related to acquisitions, which are further discussed in Note 9 to the condensed consolidated financial statements, are in the “Level 3” category for valuation purposes.

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The fair values of the our financial assets and liabilities as of June 30, 2018 and December 31,2018 are categorized as follows (in thousands):

|  | June 30, 2018 |  | December 31, 2018 |
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance company contracts |  | $ | — |  | $ | 31,897 |  | $ | — |  | $ | 31,897 |  | $ | — |  | $ | 30,622 |  | $ | — |  | $ | 30,622 |
Interest rate contract |  | — |  | 18 |  | — |  | 18 |  | — |  | 9 |  | — |  | 9 |
Total assets |  | $ | — |  | $ | 31,915 |  | $ | — |  | $ | 31,915 |  | $ | — |  | $ | 30,631 |  | $ | — |  | $ | 30,631 |
Liabilities—contingent consideration |  | $ | — |  | $ | — |  | $ | 15,713 |  | $ | 15,713 |  | $ | — |  | $ | — |  | $ | 19,997 |  | $ | 19,997 |

Derivative Instruments and Hedging Activity

Our use of derivatives consists of an interest rate swap agreement. The interest rate swap agreement was entered into to improve the predictability of cash flows from interest payments related to variable, LIBOR-based debt for the duration of the term loan described in Note 6. The interest rate swap matures in October 2019. The interest rate swap is considered an effective cash flow hedge and, as a result, the net gains or losses on such instrument were reported as a component of Other comprehensive income (loss) in the consolidated financial statements and are reclassified as net income when the hedge transaction settles.

Goodwill Impairment

Goodwill represents the excess purchase price over the estimated fair value of the assets acquired and liabilities assumed in a business combination. Goodwill is allocated to our segments based on the nature of the product line of the acquired business. The carrying value of goodwill is not amortized, but is annually tested for impairment during our second fiscal quarter and more frequently if there is an indicator of impairment. We assess qualitative factors of each of our three reporting units to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. The assessments conducted as of December 31, 2018 indicated that it is not more likely than not that the fair values of two of our three reporting units are less than their carrying amounts, including goodwill. Thus, we have determined that there is no goodwill impairment for these two reporting units.

For the third reporting unit, the results of our assessment of qualitative factors were not conclusive so we proceeded with a quantitative assessment to determine if the carrying amount of this reporting unit exceeds its fair value. The fair value of the reporting unit was calculated using the income approach. Under the income approach, the fair value of the reporting unit was calculated by estimating the present value of associated future cash flows. The analysis indicated that the estimated fair value of the third reporting unit substantially exceeded the carry amount, plus goodwill, of the reporting unit. We applied a hypothetical 10 percent decrease to the fair value of the reporting unit, which at December 31, 2018, would not have indicated impairment. Therefore, we have determined that there is no goodwill impairment for this reporting unit.

Revenue Recognition

ASU 2014-09, Revenue from Contracts with Customers (Topic 606). In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09 and related amendments (“ASC 606”), which superseded all prior revenue recognition methods and industry-specific guidance. The core principle of ASC 606 is that an entity should recognize revenue to depict the transfer of control for promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the revenue principles, an entity is required to identify the contract(s) with a customer, identify the performance obligations, determine the transaction price, allocate the transaction price to the performance obligations and recognize revenue when the performance obligation is satisfied (i.e., either over time or at a point in time). ASC 606 further requires that companies disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. On July 1, 2018, we adopted ASC 606 using the modified retrospective method, whereby the adoption does not impact any prior periods. We have identified contracts not yet completed as of July 1, 2018 and applied the new guidance on a prospective basis.

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Product Sales. We recognize revenue from sales of products upon shipment or delivery when control of the product transfers to the customer, depending on the terms of each sale, and when collection is probable. In the circumstance where terms of a product sale include subjective customer acceptance criteria, revenue is deferred until we have achieved the acceptance criteria unless the customer acceptance criteria are perfunctory or inconsequential. We generally offer customers payment terms of less than one year. In cases when payment terms extend beyond one year, we consider whether the contract has a significant financing component.

Service Revenue. Revenue from services includes after-market services, installation and implementation of products and turnkey security screening services. Generally, revenue from services is recognized over time as the services are performed. Revenues from out of warranty service maintenance contracts are recognized ratably over the respective terms of such contracts. Deferred revenue for such services arises from payments received from customers for services not yet performed.

Contract Revenue. Sales agreements with customers can be project specific, cover a period of time, and can be renewable periodically. The contracts may contain terms and conditions with respect to payment, delivery, installation, services, warranty and other rights. In certain instances, we consider an accepted customer order, governed by a master sales agreement, to be the contract with the customer when legal rights and obligations exist. Contracts with customers may include the sale of products and services, as discussed in the paragraphs above. In certain instances, contracts can contain multiple performance obligations as discussed in the paragraph below. According to the terms of a sale contract, we may receive consideration from a customer prior to transferring goods to the customer, and we record these prepayments as a contract liability. We also record deferred revenue, typically related to service contacts, when consideration is received before the services have been performed. We recognize customer deposits and deferred revenue as net sales after all revenue recognition criteria is met.

When determining revenue recognition for contracts, we use judgment based on our understanding of the obligations within each contract. We determine whether or not customer acceptance criteria are perfunctory or inconsequential. The determination of whether or not customer acceptance terms are perfunctory or inconsequential impacts the amount and timing of revenue recognition. Critical judgments also include estimates of warranty reserves, which are established based on historical experience and knowledge of the product under warranty.

Multiple Performance Obligations. Certain agreements with customers include the sale of capital equipment involving multiple elements that may include civil works to prepare a site for the installation of equipment, manufacture and delivery of equipment, installation and integration of equipment, training of customer personnel to operate the equipment and after-market service of the equipment. We generally separate multiple elements in a contract into separate performance obligations if those elements are distinct, both individually and in the context of the contract. If multiple promises comprise a series of distinct services which are substantially the same and have the same pattern of transfer, they are combined and accounted for as a single performance obligation.

In cases where obligations in a contract are distinct and thus require separation into multiple performance obligations, revenue recognition guidance requires that contract consideration be allocated to each distinct performance obligation based on its relative standalone selling price. The value allocated to each performance obligation is then recognized as revenue when the revenue recognition criteria for each distinct promise or bundle of promises has been met.

The standalone selling price for each performance obligation is an amount that depicts the amount of consideration to which the entity expects to be entitled in exchange for transferring the good or service. When there is only one performance obligation associated with a contract, the entire sale value is attributed to that obligation. When a contract contains multiple performance obligations the transaction value is first allocated using the observable price, which is generally a list price net of applicable discount or the price used to sell in similar circumstances. In circumstances when a selling price is not directly observable, we will estimate the standalone selling price using information available to us including our market assessment and expected cost plus margin.

The timetable for fulfilment of each of the distinct performance obligations can range from completion in a short amount of time and entirely within a single reporting period to completion over several reporting periods. The timing of revenue recognition for each performance obligation may be dependent upon several milestones, including physical delivery of equipment, completion of factory acceptance test, completion of site acceptance test, installation and connectivity of equipment, certification of training of personnel and, in the case of after-market service deliverables, the passage of time (typically evenly over the post-warranty period of the service deliverable).

We often provide a guarantee to support our performance under multiple-deliverable arrangements. In the event that customers are permitted to terminate such arrangements, the underlying contract typically requires payment for deliverables and reimbursement of costs incurred through the date of termination.

Effect of Adopting ASC 606. Adopting ASC 606 did not require any cumulative effect adjustment to retained earnings as of July 1, 2018 because the impact on retained earnings was immaterial. The impact to our condensed consolidated statements of operations is shown below for the three and six month periods ended December 31, 2018 and for the balance sheet as of December 31, 2018.

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Statement of Operations (in thousands)

|  | Three Months Ended December 31, 2018 |  | Six Months Ended December 31, 2018 |
|  | Results as Reported |  | Results without Adoption of ASC 606 |  | Effect of Change |  | Results as Reported |  | Results without Adoption of ASC 606 |  | Effect of Change |
Revenue |  | $ | 303,205 |  | $ | 288,376 |  | $ | 14,829 |  | $ | 569,454 |  | $ | 551,043 |  | $ | 18,411 |
Cost of goods sold |  | 192,861 |  | 185,133 |  | 7,728 |  | 363,197 |  | 354,290 |  | 8,907 |
Operating expenses |  | 78,637 |  | 74,690 |  | 3,947 |  | 158,293 |  | 152,118 |  | 6,175 |
Income from operations |  | 31,707 |  | 28,553 |  | 3,154 |  | 47,964 |  | 44,635 |  | 3,329 |
Interest and other expense, net |  | (5,620 | ) | (5,620 | ) | — |  | (10,952 | ) | (10,952 | ) | — |
Income tax provision |  | (6,980 | ) | (6,445 | ) | (535 | ) | (8,503 | ) | (7,920 | ) | (583 | )
Net income |  | $ | 19,107 |  | $ | 16,488 |  | $ | 2,619 |  | $ | 28,509 |  | $ | 25,763 |  | $ | 2,746 |

Balance Sheet (in thousands)

|  | December 31, 2018 |
|  | Balances as Reported |  | Balances without Adoption of ASC 606 |  | Effect of Change |
Assets |  |  |  |  |  |  |
Accounts receivable, net |  | $ | 226,086 |  | $ | 215,825 |  | $ | 10,261 |
Inventories |  | 315,200 |  | 324,134 |  | (8,934 | )
Other assets |  | 756,391 |  | 756,975 |  | (584 | )
Liabilities |  |  |  |  |  |  |
Current liabilities |  | 469,914 |  | 471,917 |  | (2,003 | )
Other liabilities |  | 331,567 |  | 331,567 |  | — |
Stockholders’ Equity |  |  |  |  |  |  |
Retained earnings |  | 363,254 |  | 360,508 |  | 2,746 |

We disaggregate revenue by reporting segment (Security, Optoelectronics and Manufacturing, and Healthcare) to depict the nature of revenue in a manner consistent with our business operations and to be consistent with other communications and public filings. Refer to Note 11 to our condensed consolidated financial statements for additional details of revenues by reporting segment.

During the three and six months ended December 31, 2018, we recognized additional revenueas a result of adopting ASC 606. This is primarily due to sales within our Security division where we met certain contractual performance obligations. As a result, this increased net income and accounts receivable and reduced inventories.

Contract Assets and Liabilities. We enter into contracts to sell products and provide services, and we recognize contract assets and liabilities that arise from these transactions. We recognize revenue and corresponding accounts receivable according to ASC 606 and, at times, recognize revenue in advance of the time when contracts give us the right to invoice a customer. We may also receive consideration, per terms of a contract, from customers prior to transferring goods to the customer. We record customer deposits as a contract liability. Additionally, we may receive payments, most typically for service and warranty contracts, at the onset of the contract and before the services have been performed. In such instances, we record a deferred revenue liability. We recognize these contract liabilities as sales after all revenue recognition criteria are met. The table below shows the balance of contract assets and liabilities as of June 30, 2018 and December 31, 2018, including the change between the periods.

Contract Assets (in thousands)

|  | June 30, 2018 |  | December 31, 2018 |  | Change |  | % Change |
Unbilled revenue |  | $ | 13,087 |  | $ | 19,997 |  | $ | 6,910 |  | 53 | %

Contract Liabilities (in thousands)

|  | June 30, 2018 |  | December 31, 2018 |  | Change |  | % Change |
Advances from customers |  | $ | 55,761 |  | $ | 69,410 |  | $ | 13,649 |  | 24 | %
Deferred revenue—current |  | 28,899 |  | 32,516 |  | 3,617 |  | 13 | %
Deferred revenue—long-term |  | 9,562 |  | 8,883 |  | (679 | ) | (7 | )%

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Remaining Performance Obligations. Remaining performance obligations related to ASC 606 represent the aggregate transaction price allocated to performance obligations under an original contract with a term greater than one year which are fully or partially unsatisfied at the end of the period.

As of December 31, 2018, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $162.3 million. We expect to recognize revenue on approximately 50.5% of the remaining performance obligations over the next 12 months, and the remainder is expected to be recognized thereafter.

Practical Expedients. In cases where we are responsible for shipping after the customer has obtained control of the goods, we have elected to treat these activities as fulfillment activities rather than as a separate performance obligation. Additionally, we have elected to capitalize the cost to obtain a contract only if the period of amortization would be longer than one year. We only give consideration to whether a customer agreement has a financing component if the period of time between transfer of goods and services and customer payment is greater than one year. We also utilize the “as invoiced” practical expedient in certain cases where performance obligations are satisfied over time and the invoiced amount corresponds directly with the value we are providing to the customer.

Recently Adopted Accounting Pronouncements

Revenue Recognition

In May 2014, the FASB issued ASU 2014-09 and related amendments Revenue from Contracts with Customers (Topic 606), which superseded all prior revenue recognition methods and industry-specific guidance. The core principle of ASC 606 is that an entity should recognize revenue to depict the transfer of control for promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. On July 1, 2018, we adopted ASC 606 using the modified retrospective method, whereby the adoption does not impact any prior periods.

Statement of Cash Flows

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update was issued with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230 and other topics. We adopted this ASU effective July 1, 2018 using the retrospective approach and the initial adoption had no effect on our financial position, results of operations or liquidity.

Income Taxes

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Asset Transfers of Assets Other than Inventory. The new guidance eliminates the exception for intra-entity transfers other than inventory and requires the recognition of current and deferred income taxes resulting from such a transfer when the transfer occurs. We adopted this ASU effective July 1, 2018 using the modified retrospective transition method resulting in a reclassification in the balance sheet of $3 million to decrease prepaid expenses and other assets and increase deferred tax assets.

Recently Issued Accounting Pronouncements Not Yet Adopted

Leases

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This guidance requires lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by leases with terms of more than 12 months. The ASU also will require qualitative and quantitative disclosures designed to give financial statement readers information on the amount, timing, and uncertainty of cash flows arising from leases. This ASU is effective for us in the first quarter of fiscal 2020 with early adoption permitted. We have not yet adopted this ASU and are currently evaluating the impact it may have on our financial condition and results of operations.

Retirement Benefit Plans

In August 2018, the FASB issued authoritative guidance under ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General: Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. This ASU eliminates

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requirements for certain disclosures and requires additional disclosures under defined benefit pension plans and other postretirement plans. We are required to adopt this new guidance in the first quarter of fiscal 2021. We are currently evaluating the potential impact of the adoption of this guidance on our consolidated financial statements.

Intangibles

In August 2018, the FASB issued authoritative guidance under ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software: Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. This ASU requires implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancellable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. We are required to adopt this new guidance in the first quarter of fiscal 2021. We are currently evaluating the potential impact of adoption of this guidance on our consolidated financial statements.

2. Business Combinations

Under ASU 805, Business Combinations the acquisition method of accounting requires us to record assets acquired less liabilities assumed in an acquisition at their estimated fair values at the date of acquisition. Any excess of the total estimated purchase price over the estimated fair value of the assets acquired less liabilities assumed should be recorded as goodwill. Such valuations require management to make significant estimates and assumptions, especially with respect to intangible assets. Significant estimates in valuing certain intangible assets include, but are not limited to, future expected cash flows from acquired customers, acquired technology, trade names, useful lives and discount rates. Management’s estimates of fair value are based upon assumptions believed to be reasonable but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, which is one year from the acquisition date, we may record adjustments to the assets acquired and liabilities assumed, with corresponding adjustments to goodwill, as additional information becomes available. Upon the conclusion of the measurement period, any subsequent adjustments are reflected in reported earnings.

Fiscal Year 2019 Business Acquisitions

In July 2018, we (through our Optoelectronics and Manufacturing division) acquired an optoelectronics solutions business for $17.5 million, plus up to $1 million in potential contingent consideration, which may be earned over an 18-month period. The acquisition was financed with cash on hand and borrowings under our existing revolving bank line of credit. The goodwill recognized for this business is expected to be deductible for income tax purposes.

In August 2018, we (through our Security division) completed an acquisition of a privately held services company for approximately $0.8 million, plus up to approximately $5 million in contingent consideration which may be earned over a five-year period. The acquisition was financed with cash on hand. The goodwill recognized for this business is not expected to be deductible for income tax purposes.

These business acquisitions, individually and in the aggregate, were not material to our consolidated financial statements. Accordingly, pro-forma historical results of operations related to these businesses have not been presented.

Fiscal Year 2018 Business Acquisitions

Acquisition of Explosive Trace Detection Business

On July 7, 2017, we acquired the global explosive trace detection business (“ETD”) from Smiths Group plc. This acquisition was a carve out from a larger entity. We financed the total purchase price of $80.5 million with a combination of cash on hand and borrowings under our revolving bank line of credit. Pro-forma results were not presented because, based on the date of the acquisition, there was not a material difference between pro-forma and actual results in the condensed consolidated financial statements of operations for the six months ended December 31, 2017 and 2018.

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The valuation of certain assets and liabilities of ETD were performed by a third party valuation specialist. The final allocation was as follows:

Cash and cash equivalents |  | $ | 4 |
Accounts receivable |  | 15,517 |
Inventories |  | 11,678 |
Property and equipment |  | 1,599 |
Intangible assets |  | 30,370 |
Deferred tax asset |  | 2,738 |
Other long-term assets |  | 297 |
Accounts payable |  | (4,784 | )
Accrued payroll and related expenses |  | (2,116 | )
Deferred revenues—current |  | (924 | )
Accrued warranties |  | (2,068 | )
Advances from customers |  | (670 | )
Other accrued expenses and current liabilities |  | (1,074 | )
Deferred revenues—long term |  | (232 | )
Net assets acquired |  | 50,335 |
Goodwill |  | 30,132 |
Total consideration |  | $ | 80,467 |

The goodwill is largely attributable to expected growth, intellectual capital and the assembled workforce of the ETD business. Intangible assets were recorded at estimated fair value, as determined by management based on available information, with assistance from a third party. The fair value attributed to the intangible assets acquired was based on estimates, assumptions and other information compiled by management, and valuations that utilized established valuation techniques. The value attributed to goodwill and intangible assets is partially non-deductible for income tax purposes. The following table summarizes the fair value of acquired identifiable intangible assets as of the acquisition date (amounts in thousands):

|  | Weighted |  |  |
|  | Average |  | Fair |
|  | Lives |  | Value |
Developed technology |  | 10 years |  | $ | 14,210 |
Customer relationships/backlog |  | 7 years |  | 16,070 |
In-process research and development (“IPR&D”) |  |  |  | 90 |
Total intangible assets |  |  |  | $ | 30,370 |

Other Fiscal Year 2018 Business Acquisitions

In July 2017, we (through our Security division) completed an acquisition of a privately held technology company. The acquisition was financed with cash on hand and was in an amount including potential earnout consideration determined to be insignificant by management.

In January 2018, we (through our Optoelectronics and Manufacturing division) acquired an electronics component designer and manufacturer for approximately $22 million, plus up to $6 million in contingent consideration which may be earned over a three-year period. The goodwill recognized for this business is not expected to be deductible for income tax purposes. The acquisition was financed with cash on hand and borrowings under our revolving bank line of credit.

3. Balance Sheet Details

The following tables provide details of selected balance sheet accounts (in thousands):

|  | June 30, 2018 |  | December 31, 2018 |
Accounts receivable |  | $ | 225,336 |  | $ | 240,749 |
Less allowance for doubtful accounts |  | (14,592 | ) | (14,663 | )
Total |  | $ | 210,744 |  | $ | 226,086 |

|  | June 30, 2018 |  | December 31, 2018 |
Raw materials |  | $ | 156,612 |  | $ | 153,195 |
Work-in-process |  | 89,468 |  | 86,582 |
Finished goods |  | 67,472 |  | 75,423 |
Total |  | $ | 313,552 |  | $ | 315,200 |

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|  | June 30, |  | December 31, |
|  | 2018 |  | 2018 |
Land |  | $ | 16,569 |  | $ | 16,555 |
Buildings, civil works and improvements |  | 56,585 |  | 55,083 |
Leasehold improvements |  | 9,681 |  | 10,144 |
Equipment and tooling |  | 117,294 |  | 125,099 |
Furniture and fixtures |  | 3,331 |  | 3,175 |
Computer equipment |  | 18,759 |  | 17,863 |
Computer software |  | 19,509 |  | 19,555 |
Computer software implementation in process |  | 4,318 |  | 6,640 |
Construction in process |  | 790 |  | 2,428 |
Total |  | 246,836 |  | 256,542 |
Less accumulated depreciation and amortization |  | (131,312 | ) | (135,272 | )
Property and equipment, net |  | $ | 115,524 |  | $ | 121,270 |

Depreciation expense was $16.8 million and $5.2 million for the three months ended December 31, 2017 and 2018, respectively, and approximately $33.0 million and $10.3 million for the six months ended December 31, 2017 and 2018, respectively. The decrease in depreciation is primarily related to a transfer of assets.

In January 2018, we entered into a two-year agreement with the Mexican government to continue providing security screening services. Upon inception of the contract, we transferred certain fixed assets with a net book value of $29.5 million to the customer, and this remaining cost to obtain the contract is amortized on a straightline basis over the term of the contract as corresponding revenues are recognized. During the three and six months ended December 31, 2018, we recognized $3.7 million and $7.1 million, respectively, of amortization expense related to such assets. As of December 31, 2018, $13.7 million and $0.5 million, respectively, are recorded within Prepaid expenses and other current assets and Other assets.

4. Goodwill and Intangible Assets

The changes in the carrying value of goodwill for the six month period ended December 31, 2018 are as follows (in thousands):

|  |  |  |  |  | Optoelectronics |  |  |
|  |  |  |  |  | and |  |  |
|  | Security |  | Healthcare |  | Manufacturing |  |  |
|  | Division |  | Division |  | Division |  | Consolidated |
Balance as of June 30, 2018 |  | $ | 191,810 |  | $ | 40,157 |  | $ | 60,246 |  | $ | 292,213 |
Goodwill acquired or adjusted during the period |  | 6,541 |  | — |  | 7,415 |  | 13,956 |
Foreign currency translation adjustment |  | (65 | ) | (102 | ) | (838 | ) | (1,005 | )
Balance as of December 31, 2018 |  | $ | 198,286 |  | $ | 40,055 |  | $ | 66,823 |  | $ | 305,164 |

Intangible assets consisted of the following (in thousands):

|  |  |  | June 30, 2018 |  | December 31, 2018 |
|  | Weighted |  | Gross |  |  |  |  |  | Gross |  |  |  |  |
|  | Average |  | Carrying |  | Accumulated |  | Intangibles |  | Carrying |  | Accumulated |  | Intangibles |
|  | Lives |  | Value |  | Amortization |  | Net |  | Value |  | Amortization |  | Net |
Amortizable assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Software development costs |  | 9 years |  | $ | 28,174 |  | $ | (9,423 | ) | $ | 18,751 |  | $ | 29,215 |  | $ | (11,597 | ) | $ | 17,618 |
Patents |  | 19 years |  | 8,401 |  | (1,618 | ) | 6,783 |  | 8,243 |  | (1,680 | ) | 6,563 |
Developed technology |  | 10 years |  | 52,780 |  | (9,706 | ) | 43,074 |  | 54,582 |  | (12,480 | ) | 42,102 |
Customer relationships/backlog |  | 7 years |  | 63,398 |  | (17,891 | ) | 45,507 |  | 65,673 |  | (20,494 | ) | 45,179 |
Total amortizable assets |  |  |  | 152,753 |  | (38,638 | ) | 114,115 |  | 157,713 |  | (46,251 | ) | 111,462 |
Non-amortizable assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  |  |  | 25,596 |  | — |  | 25,596 |  | 26,450 |  | — |  | 26,450 |
IPR&D |  |  |  | 2,290 |  | — |  | 2,290 |  | 2,290 |  | — |  | 2,290 |
Total intangible assets |  |  |  | $ | 180,639 |  | $ | (38,638 | ) | $ | 142,001 |  | $ | 186,453 |  | $ | (46,251 | ) | $ | 140,202 |

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Amortization expense related to intangible assets was $4.5 million and $5.6 million for the three month periods ended December 31, 2017 and 2018, respectively. For the six months ended December 31, 2017 and 2018, amortization expense was $8.7 million and $10.9 million, respectively. At December 31, 2018, the estimated future amortization expense was as follows (in thousands):

2019 (remaining 6 months) |  | $ | 9,960 |
2020 |  | 19,634 |
2021 |  | 19,281 |
2022 |  | 14,670 |
2023 |  | 13,448 |
Thereafter, including assets that have not yet begun to be amortized |  | 34,469 |
Total |  | $ | 111,462 |

Software development costs for software products incurred before establishing technological feasibility are charged to operations. Software development costs incurred after establishing technological feasibility are capitalized on a product-by-product basis until the product is available for general release to customers at which time amortization begins. Annual amortization, charged to cost of goods sold, is the amount computed using the ratio that current revenues for a product bear to the total current and anticipated future revenues for that product. In the event that future revenues are not estimable, such costs are amortized on a straight line basis over the remaining estimated economic life of the product. Amortizable assets that have not yet begun to be amortized are included in Thereafter in the table above. For the three months ended December 31, 2017 and 2018, we capitalized software development costs in the amount of $0.2 million and $0.6 million, respectively. For the six month periods ended December 31, 2017 and 2018, we capitalized software development costs in the amount of $0.3 million and $1.0 million, respectively.

5. Impairment, restructuring and other charges

Impairment

During the three and six months ended December 31, 2018, there were no impairment charges. During the three and six months ended December 31, 2017, we (i) abandoned a product line in our Security division that became redundant as a result of the ETD acquisition, (ii) abandoned a non-core product line in our Healthcare division, and (iii) abandoned certain trademarks in our Optoelectronics and Manufacturing division that were no longer used. As a result, $3.1 million of assets, including intangible and fixed assets, were written off as we determined that these assets have no value and were permanently impaired.

Restructuring and Other Charges

We endeavor to align our global capacity and infrastructure with demand by our customers and also to fully integrate acquisitions, and thereby improve operational efficiency. We intiated a restructuring during fiscal 2019 in our Healthcare division in order to realign the organization and enable further investment in priority areas, and we have incurred associated charges of approximately $3.3 million and $3.5 million for the three and six months ended December 31, 2018, respectively.

During the three and six months ended December 31, 2018, we recovered certain legal costs related to class action litigation and government investigations through insurance reimbursement. This resulted in a net credit to restructuring and other charges in our Corporate segment of $4.6 million and $1.0 million for the three and six months ended December 31, 2018, respectively.

During the three and six months ended December 31, 2017, we incurred professional fees of $0.2 million and $0.9 million, respectively, to complete the ETD acquisition. During the three months ended December 31, 2017, we accrued $4.3 million of litigation and estimated settlement costs, $4.2 million of which was recorded in our Healthcare division.

The following table summarizes impairment, restructuring and other charges for the periods set forth below (in thousands):

|  | Three Months Ended December 31, 2017 |
|  | Security Division |  | Healthcare Division |  | Optoelectronics and Manufacturing Division |  | Corporate |  | Total |
Impairment charges |  | $ | 1,490 |  | $ | 579 |  | $ | 1,075 |  | $ | — |  | $ | 3,144 |
Acquisition-related costs |  | — |  | — |  | — |  | 361 |  | 361 |
Employee termination costs |  | 90 |  | — |  | 146 |  | — |  | 236 |
Facility closures/consolidation |  | 11 |  | 243 |  | — |  | — |  | 254 |
Legal and accrued settlement costs, net |  | — |  | 4,200 |  | — |  | 102 |  | 4,302 |
Total expensed |  | $ | 1,591 |  | $ | 5,022 |  | $ | 1,221 |  | $ | 463 |  | $ | 8,297 |

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|  | Three Months Ended December 31, 2018 |
|  | Security Division |  | Healthcare Division |  | Optoelectronics and Manufacturing Division |  | Corporate |  | Total |
Acquisition-related costs |  | $ | — |  | $ | — |  | $ | 20 |  | $ | — |  | $ | 20 |
Employee termination costs |  | (46 | ) | 1,227 |  | 26 |  | — |  | 1,207 |
Facility closures/consolidation |  | — |  | 2,108 |  | — |  | — |  | 2,108 |
Legal and accrued settlement costs, net |  | — |  | — |  | — |  | (4,600 | ) | (4,600 | )
Total expensed |  | $ | (46 | ) | $ | 3,335 |  | $ | 46 |  | $ | (4,600 | ) | $ | (1,265 | )

|  | Six Months Ended December 31, 2017 |
|  | Security Division |  | Healthcare Division |  | Optoelectronics and Manufacturing Division |  | Corporate |  | Total |
Impairment charges |  | $ | 1,490 |  | $ | 579 |  | $ | 1,075 |  | $ | — |  | $ | 3,144 |
Acquisition-related costs |  | — |  | — |  | — |  | 1,181 |  | 1,181 |
Employee termination costs |  | 330 |  | — |  | 146 |  | — |  | 476 |
Facility closures/consolidation |  | 81 |  | 243 |  | — |  | — |  | 324 |
Legal and accrued settlement costs, net |  | — |  | 4,200 |  | — |  | 102 |  | 4,302 |
Total expensed |  | $ | 1,901 |  | $ | 5,022 |  | $ | 1,221 |  | $ | 1,283 |  | $ | 9,427 |

|  | Six Months Ended December 31, 2018 |
|  | Security Division |  | Healthcare Division |  | Optoelectronics and Manufacturing Division |  | Corporate |  | Total |
Acquisition-related costs |  | $ | — |  | $ | — |  | $ | 287 |  | $ | — |  | $ | 287 |
Employee termination costs |  | — |  | 1,418 |  | 133 |  | — |  | 1,551 |
Facility closures/consolidation |  | — |  | 2,108 |  | — |  | — |  | 2,108 |
Legal and accrued settlement costs, net |  | — |  | — |  | — |  | (1,015 | ) | (1,015 | )
Total expensed |  | $ | — |  | $ | 3,526 |  | $ | 420 |  | $ | (1,015 | ) | $ | 2,931 |

The changes in the accrued liability for restructuring and other charges for the six month period ended December 31, 2018 were as follows (in thousands):

|  | Acquisition- related Costs |  | Employee Termination Costs |  | Facility Closure/ Consolidation Cost |  | Legal Charges |  | Total |
Balance as of June 30, 2018 |  | $ | — |  | $ | 837 |  | $ | 399 |  | $ | 14,065 |  | $ | 15,301 |
Restructuring and other charges, net |  | 287 |  | 1,551 |  | 2,108 |  | (1,015 | ) | 2,931 |
Payments and other adjustments |  | (287 | ) | (1,589 | ) | (2,078 | ) | (861 | ) | (4,815 | )
Balance as of December 31, 2018 |  | $ | — |  | $ | 799 |  | $ | 429 |  | $ | 12,189 |  | $ | 13,417 |

6. Borrowings

Revolving Credit Facility

In December 2016, we entered into an amendment to our revolving credit facility, which, among other things, increased the aggregate committed amount available to us from $450 million to $525 million and extended the maturity date to December 2021. The credit facility includes a $300 million sub limit for letters of credit. Under certain circumstances, we have the ability to increase the facility by the greater of $250 million or such amount as would not cause our secured leverage ratio to exceed a specified level. Borrowings under this facility bear interest at LIBOR, or a comparable rate in accordance with the terms of the credit agreement, plus a margin of 1.50% as of December 31, 2018, but this margin can range from 1.25% to 2.0% based on our consolidated net leverage ratio as defined in the credit facility. Letters of credit reduce the amount available to borrow by their face value. The unused portion of the facility bears a commitment fee of 0.20% as of December 31, 2018, but this fee can range from 0.20% to 0.30% based on our consolidated net leverage ratio as defined in the credit facility. Our borrowings under the credit agreement are guaranteed by certain of our U.S. based subsidiaries and are secured by substantially all of our assets and the assets of certain of our subsidiaries. The credit agreement contains various representations and warranties, affirmative, negative and financial covenants and conditions of default. As of December 31, 2018, there was $149.0 million of borrowings outstanding under the revolving credit facility and $58.9 million outstanding under the letters of credit sub-facility. The amount available to borrow under the credit facility as of December 31, 2018 was $317.1 million. Loan amounts under the revolving credit facility may be borrowed, repaid and re-borrowed during the term.

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Although the principal amount of each revolving loan is due and payable in full on the maturity date, we have the right to repay each revolving loan in whole or in part from time to time without penalty. It is our practice to routinely borrow and repay several times per year under this revolving credit facility. Therefore, borrowings under the credit facility are included in current liabilities. As of December 31, 2018, we are in compliance with all covenants under this credit facility.

1.25% Convertible Senior Notes Due 2022

In February 2017, we issued $287.5 million of the Notes in a private offering. The Notes are governed by an indenture dated February 22, 2017. The maturity for the payment of principal is September 1, 2022. The Notes bear interest at the rate of 1.25% payable in cash semiannually in arrears on each March 1 and September 1. The Notes are senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to any of our unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries, as well as any of our existing and future indebtedness that may be guaranteed by our subsidiaries to the extent of such guarantees (including the guarantees of certain of our subsidiaries under our existing revolving credit facility).

The Notes are convertible prior to March 1, 2022 only upon specified events and during specified periods and are, thereafter convertible, at any time, in each case at an initial conversion rate of 9.3056 per $1,000 principal amount of the Notes, which is equal to an initial conversion price of approximately $107.46 per share or a 38.5% premium to our stock price at the time of the issuance. The conversion rate is subject to adjustment upon certain events. Upon conversion, the Notes may be settled, at our election, in shares of our common stock, cash or a combination of cash and shares of common stock. We have initially elected a combination settlement method to satisfy the conversion obligation, which allows us to settle the principal amount of the Notes in cash and to settle the excess conversion value, if any, in shares of common stock, and cash in lieu of fractional shares.

We may not redeem the Notes prior to March 6, 2020. Thereafter, we may redeem the Notes if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any period of 30 consecutive trading days. If we undergo a fundamental change, as defined in the indenture for the Notes, subject to certain conditions, holders of the Notes may require us to repurchase all or part of the Notes for cash at a price equal to 100% of the principal amount of the Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The occurrence of a fundamental change will also result in the Notes becoming immediately convertible.

Pursuant to ASC 470-20, we allocated the $287.5 million gross proceeds of the Notes between liability and equity components. The initial $242.4 million liability component was determined based on the fair value of similar debt instruments excluding the conversion feature for similar terms and priced on the same day the Notes were issued. The initial $45.1 million equity component represents the debt discount and was calculated as the difference between the fair value of the debt and the gross proceeds of the Notes. Issuance costs of $7.7 million were allocated between debt ($6.5 million) and equity ($1.2 million) components with the portion allocated to the debt presented as an offset against long term debt in the consolidated balance sheet and is amortized as interest expense over the life of the Notes using the effective interest method. The total interest expense recognized for the three months and six months ended December 31, 2018 was $3.2 million and $6.3 million, respectively, which consisted of $0.9 million and $1.8 million of contractual interest expense, $2.0 million and $3.9 million of debt discount amortization and $0.3 million and $0.6 million of amortization of debt issuance costs. The total interest expense recognized for the three months and six months ended December 31, 2017 was $3.1 million and $6.1 million, respectively, which consists of $0.9 million and $1.8 million of contractual interest expense, $1.9 million and $3.7 million of debt discount amortization and $0.3 million and $0.6 million of amortization of debt issuance costs. As of December 31, 2018, the unamortized debt discount was $31.3 million which is being amortized over the remaining contractual term to maturity of the Notes using an effective interest rate of 4.50%. The unamortized debt issuance cost of $4.3 million as of December 31, 2018 is amortized on a straight-line basis, which approximates the effective interest method, over the life of the Notes. Based on our December 31, 2018 stock price of $73.30 per share, the “if-converted” value of the Notes did not exceed the principal amount.

Other Borrowings

Several of our foreign subsidiaries maintain bank lines of credit, denominated in local currencies and U.S. dollars, primarily for the issuance of letters of credit. As of December 31, 2018, $61.6 million was outstanding under these credit facilities. As of December 31, 2018, the total amount available under these credit facilities was $6.7 million.

In September 2012, we entered into a seven year term loan agreement for $11.1 million to fund the acquisition of land and a building in the state of Washington. The principal on the loan, together with interest at LIBOR plus 1.25%, is payable on a monthly basis over seven years. The outstanding balance on this loan as of December 31, 2018 was $1.3 million compared to a balance of $2.1 million as

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of June 30, 2018. Concurrent with entering into the floating rate loan, we entered into an interest rate swap agreement that effectively locks the interest rate of the loan at 2.2% per annum for the term of the loan.

Long-term debt consisted of the following (in thousands):

|  | June 30, 2018 |  | December 31, 2018 |
1.25% convertible notes due 2022: |  |  |  |  |
Principal amount |  | $ | 287,500 |  | $ | 287,500 |
Unamortized discount |  | (35,133 | ) | (31,251 | )
Unamortized debt issuance costs |  | (4,897 | ) | (4,310 | )
1.25% convertible notes due 2022, net of unamortized discount and debt issuance costs |  | 247,470 |  | 251,939 |
Term loans |  | 2,114 |  | 1,321 |
Other long-term debt |  | 1,658 |  | 2,031 |
|  | 251,242 |  | 255,291 |
Less current portion of long-term debt |  | (2,262 | ) | (2,107 | )
Long-term portion of debt |  | $ | 248,980 |  | $ | 253,184 |

7. Stockholders’ Equity

Stock-based Compensation

As of December 31, 2018, we maintained the Amended and Restated 2012 Incentive Award Plan (the “2012 Plan”) and the Amended and Restated 2006 Equity Participation Plan (“2006 Plan”) as stock-based employee compensation plans. No further grants may be made under the 2006 Plan. In addition, pursuant to the acquisition of American Science and Engineering, Inc. (“AS&E”), we assumed two stock-based employee compensation plans: the AS&E 2005 Equity and Incentive Plan (“2005 AS&E Plan”) and the AS&E 2014 Equity and Incentive Plan (“2014 AS&E Plan”). No new equity grants will be made under the 2005 AS&E Plan or the 2014 AS&E Plan. The 2012 Plan, the 2006 Plan, the 2005 AS&E Plan and the 2014 AS&E Plan are collectively referred to as the “OSI Plans”.

We recorded stock-based compensation expense in the condensed consolidated statements of operations as follows (in thousands):

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Cost of goods sold |  | $ | 247 |  | $ | 150 |  | $ | 487 |  | $ | 356 |
Selling, general and administrative |  | 5,849 |  | 7,833 |  | 10,960 |  | 12,945 |
Research and development |  | 157 |  | 180 |  | 293 |  | 325 |
Stock-based compensation expense before taxes |  | $ | 6,253 |  | $ | 8,163 |  | $ | 11,740 |  | $ | 13,626 |
Less: related income tax benefit |  | (1,935 | ) | (2,038 | ) | (3,627 | ) | (3,380 | )
Stock-based compensation expense, net of estimated taxes |  | $ | 4,318 |  | $ | 6,125 |  | $ | 8,113 |  | $ | 10,246 |

As of December 31, 2018, total unrecognized compensation cost related to stock-based compensation grants under the OSI Plans were estimated at $0.7 million for stock options and $24.7 million for RSUs. We expect to recognize these costs over a weighted average period of 2.2 years with respect to the stock options and 1.8 years for grants of RSUs.

The following summarizes stock option activity during the six months ended December 31, 2018:

|  | Number of Options |  | Weighted Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at June 30, 2018 |  | 677,525 |  | $ | 32.80 |  |  |  |  |
Granted |  | 18,135 |  | $ | 72.39 |  |  |  |  |
Exercised |  | (49,395 | ) | $ | 18.09 |  |  |  |  |
Expired or forfeited |  | (6,914 | ) | $ | 69.47 |  |  |  |  |
Outstanding at December 31, 2018 |  | 639,351 |  | $ | 34.67 |  | 2.7 years |  | $ | 25,026 |
Exercisable at December 31, 2018 |  | 600,813 |  | $ | 31.92 |  | 2.3 years |  | $ | 25,001 |

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The following summarizes RSU award activity during the six months ended December 31, 2018:

|  | Shares |  | Weighted- Average Fair Value |
Nonvested at June 30, 2018 |  | 526,377 |  | $ | 71.56 |
Granted |  | 358,213 |  | 73.64 |
Vested |  | (356,705 | ) | 71.02 |
Forfeited |  | (12,414 | ) | 73.54 |
Nonvested at December 31, 2018 |  | 515,471 |  | $ | 73.33 |

As of December 31, 2018, there were approximately 1.6 million shares available for grant under the 2012 Plan. Under the terms of the 2012 Plan, RSUs granted from the pool of shares available for grant reduce the pool by 1.87 shares for each award granted. RSUs forfeited and returned to the pool of shares available for grant increase the pool by 1.87 shares for each award forfeited.

We granted 117,346 and 97,514 performance-based RSUs during the six months ended December 31, 2017 and 2018, respectively. These performance based RSU awards are contingent on the achievement of certain performance metrics. The payout related to these awards can range from zero to 280% of the original number of shares or units awarded.

Share Repurchase Program

In March 2018, our Board of Directors authorized a share repurchase program of up to 1,000,000 shares. This program does not expire unless our Board of Directors acts to terminate the program. The timing and actual number of shares purchased depend on a variety of factors, including stock price, general business and market conditions and other investment opportunities and may be purchased through the open market. Upon repurchase, the shares are restored to the status of authorized but unissued, and we record them as a reduction in the number of shares of common stock issued and outstanding in our consolidated financial statements.

During the six months ended December 31, 2018, we repurchased 288,316 shares of our common stock, and as of December 31, 2018, there were 562,707 shares available to repurchase under the program.

8. Retirement Benefit Plans

We sponsor various retirement benefit plans including qualified and nonqualified defined benefit pension plans for our employees. The components of net periodic pension expense are as follows (in thousands):

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Service cost |  | $ | 216 |  | $ | 98 |  | $ | 432 |  | $ | 196 |
Interest cost |  | 8 |  | 8 |  | 16 |  | 16 |
Amortization of prior service cost |  | 70 |  | 14 |  | 140 |  | 28 |
Net periodic pension expense |  | $ | 294 |  | $ | 120 |  | $ | 588 |  | $ | 240 |

For the three months ended December 31, 2017, we made no contributions to these defined benefit plans. For the three months ended December 31, 2018, we made contributions of $1.0 million to these defined benefit plans. For each of the six months ended December 31, 2017 and 2018, we made contributions of $1.0 million to these defined benefit plans.

We also maintain various defined contribution plans. For the three months ended December 31, 2017 and 2018, we made contributions of $1.4 million and $1.3 million, respectively, to these defined contribution plans. For the six months ended December 31, 2017 and 2018, we made contributions of $3.0 million and $3.1 million, respectively, to these defined contribution plans.

9. Commitments and Contingencies

Contingent Acquisition Obligations

Under the terms and conditions of the purchase agreements associated with certain acquisitions, we may be obligated to make additional payments based on the achievement of certain sales or profitability milestones through the acquired operations. For agreements that contain contingent consideration caps, the maximum amount of such potential future payments is $35.0 million as of December 31, 2018. In addition, we are required to make royalty payments through 2022 based on the license of, or sales of products containing, the technology of CXR Limited, a company acquired in 2004.

We account for such contingent payments for acquisitions which occurred through the end of fiscal year 2009 as additions to the purchase price of the acquired business; and we made $1.3 million of such payments during the three and six months ended December

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31, 2018. For acquisitions completed after fiscal 2009, pursuant to Financial Accounting Standard 141R, which was codified into ASC 805, the estimated fair value of these obligations is recorded as a liability at the time of the acquisition with subsequent revisions recorded in Selling, general and administrative expense in the consolidated financial statements. The estimated fair value measurements of contingent earn-out obligations are primarily based on unobservable inputs, which may include projected revenues, gross margins, operating income, and the estimated probability of achieving the earn-outs.

These projections and probabilities are used to estimate future contingent earnout payments, which are discounted back to present value to compute contingent earnout liabilities. The following table provides a roll-forward from June 30, 2018 to December 31, 2018 of the contingent consideration liability, which is included in Other accrued expenses and current liabilities, and Other long-term liabilities in our consolidated balance sheets:

Beginning fair value, June 30, 2018 |  | $ | 15,713 |
Additions |  | 5,173 |
Change in fair value |  | (889 | )
Payments |  | — |
Ending fair value, December 31, 2018 |  | $ | 19,997 |

Environmental Contingencies

We are subject to various environmental laws. Our practice is to conduct appropriate environmental investigations at our manufacturing facilities in North America, Asia Pacific, and Europe, and, to the extent practicable, on all new properties in order to identify, as of the date of such investigation, potential areas of environmental concern related to past and present activities or from nearby operations. In certain cases, we have conducted further environmental assessments consisting of soil and groundwater testing and other investigations deemed appropriate by independent environmental consultants.

We continue to investigate contamination of the soil and groundwater beneath our Hawthorne, California facility that resulted from unspecified on and off site releases occurring prior to our occupancy. We believe the releases are of a historical nature and not uncommon to the region in general. We continue to take voluntary actions, in cooperation with the local governing agency, to investigate the site in order to develop appropriate remedial actions. We have not accrued for loss contingencies relating to the Hawthorne facility or any other environmental matters because we believe that, although unfavorable outcomes are possible, they are not considered by our management to be probable and reasonably estimable. If one or more of these environmental matters are resolved in a manner adverse to us, the impact on our business, financial condition, results of operations and cash flow could be material.

Indemnifications and Certain Employment-Related Contingencies

In the normal course of business, we have agreed to indemnify certain parties with respect to certain matters. We have agreed to hold certain parties harmless against losses arising from a breach of representations and warranties or covenants, or intellectual property infringement or other claims made by third parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. In addition, we have entered into indemnification agreements with our directors and certain of our officers. It is not possible to determine the maximum potential indemnification amount under these indemnification agreements due to a limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. We have not recorded any liability for costs related to contingent indemnification obligations as of December 31, 2018.

On December 31, 2017, we and Deepak Chopra, our Chief Executive Officer, entered into an amendment to Mr. Chopra’s employment agreement that, among other things, provides for a $13.5 million bonus payment to Mr. Chopra on or within 45 days of January 1, 2024 contingent upon Mr. Chopra’s continued employment with us through that date, subject to accelerated payout terms in the event of Mr. Chopra’s death or disability. The bonus is recorded in the financial statements over the remaining term of the employment agreement and is included in Other long-term liabilities.

Product Warranties

We offer our customers warranties on many of the products that we sell. These warranties typically provide for repairs and maintenance of the products if problems arise during a specified time period after original shipment. Concurrent with the sale of products, we record a provision for estimated warranty expenses with a corresponding increase in cost of goods sold. We periodically adjust this provision based on historical experience and anticipated expenses. We charge actual expenses of repairs under warranty, including parts and labor, to this provision when incurred. The warranty provision is included in Other accrued expenses and current liabilities in the consolidated balance sheets.

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The following table presents changes in warranty provisions (in thousands):

|  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |
Balance at beginning of period |  | $ | 15,178 |  | $ | 21,819 |
Additions |  | 5,769 |  | 3,975 |
Acquisitions and adjustments |  | 1,415 |  | (581 | )
Reductions for warranty repair costs |  | (3,619 | ) | (3,261 | )
Balance at end of period |  | $ | 18,743 |  | $ | 21,952 |

Legal Proceedings

In December 2017, a short seller released a report regarding our compliance with the FCPA. Following that report, we and certain of our executive officers have been named as defendants in several lawsuits in the United States District Court for the Central District of California (the “District Court”) that were filed in December 2017 and February 2018. Each of the complaints closely tracks the allegations set forth in the short seller’s report. All of the actions, which were consolidated by the District Court in March 2018 in an action captioned Arkansas Teacher Retirement System et al. v. OSI Systems, Inc. et al., No. 17 cv 08841, allege violations of Sections 10(b) and 20(a) of Exchange Act, relating to certain of our public statements and filings with the SEC, and seek damages and other relief based upon the allegations in the complaints. In April and May 2018, two shareholder derivative complaints were filed purportedly on behalf of the Company against the current members of our Board of Directors (as individual defendants), a former member of our Board of Directors, and our Chief Financial Officer. The first, captioned Riley v. Chopra et al., No. 18 cv 03371, was filed in the District Court, and the second, captioned Genesee County Employees’ Retirement System v. Chopra, et al., No. BC705958, was filed in the Superior Court of the State of California, County of Los Angeles. The complaints allege, among other things, breach of fiduciary duties relating to the allegations contained in the above mentioned short seller report. The complaints seek damages, restitution, injunctive relief, attorneys’ and experts’ fees, costs, expenses, and other unspecified relief. We believe that these actions are without merit and intend to defend them vigorously, and we expect to incur costs associated with defending against these actions. At this early stage of the litigations, the ultimate outcomes are uncertain and we cannot reasonably predict the timing or outcomes, or estimate the amount of loss, if any, or their effect, if any, on our financial statements.

Following the short seller report, both the SEC and the DOJ commenced investigations into our compliance with the FCPA. The SEC has subpoenaed documents from the Company, and we are responding to that subpoena and providing the same documents to the DOJ. At this time, we are unable to predict what, if any, action may be taken by the DOJ or SEC as a result of these FCPA related investigations, or any penalties or remedial measures these agencies may seek. In an unrelated matter, the SEC and DOJ are also conducting an investigation of trading in our securities and have each subpoenaed information regarding trading by executives, directors, and employees, as well as our operations and disclosures in and around the time of certain trades. With respect to these trading related matters, we have taken action with respect to a senior level employee. At this time, we are unable to predict what, if any, action may be taken by the DOJ or SEC as a result of these trading related investigations, or any penalties or remedial measures these agencies may seek. We place a high priority on compliance with our anti corruption and securities trading policies and are cooperating with each of the government investigations.

We are involved in various other claims and legal proceedings arising in the ordinary course of business. In our opinion after consultation with legal counsel, the ultimate disposition of such proceedings is not likely to have a material adverse effect on our business, financial condition, results of operations or cash flows. We have not accrued for loss contingencies relating to any such matters because we believe that, although unfavorable outcomes in the proceedings are possible, they are not considered by management to be probable and reasonably estimable. If one or more of these matters are resolved in a manner adverse to our company, the impact on our business, financial condition, results of operations and cash flows could be material.

10. Income Taxes

The Tax Cuts and Jobs Act (the “Tax Act”) enacted in 2017 resulted in the U.S. Federal income tax rate being reduced from 35% to 21% effective January 1, 2018. During the measurement period, which is one year from the date of enactment, or the completion of all estimates made in connection with the Tax Act, companies are permitted to make additional income tax adjustments and revisions of estimates related to the Tax Act. During the quarter ended December 31, 2018, we concluded our analysis of the impact of the Tax Act and made no adjustments to the provisional amounts previously recorded.

The Tax Act subjects a U.S. corporation to tax on its GILTI (Global Intangible Low Income Tax), FDII (Foreign-Derived Tangible Income Taxes), and BEAT (Base Erosion Anti-abuse Tax). In the second quarter of fiscal 2019, we included the impact of these taxes in our forecast effective tax rate. Interpretive guidance on the accounting for GILTI states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. In the fiscal quarter ended December 31, 2018, we made the accounting policy election to recognize GILTI as a period expense.

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The determination of the annual effective tax rate is based upon a number of significant estimates and judgments, including the estimated annual pretax income in each tax jurisdiction in which we operate, and the development of tax planning strategies during the year. In addition, as a global commercial enterprise, our tax expense can be impacted by changes in tax rates or laws, such as the Tax Act, the finalization of tax audits and reviews, and other factors that cannot be predicted with certainty. As such, there can be significant volatility in interim tax provisions.

Our effective tax rate for the three and six months ended December 31, 2018 was 26.8% and 23.0%, respectively. Excluding certain discrete tax items, the adjusted non-GAAP effective tax rate for the three and six months ended December 31, 2018 was 28.3% and 28.2%, respectively. During the three and six month periods ended December 31, 2018, we recognized tax benefits for equity-based compensation of $0.4 million and $1.9 million, respectively, under ASU 2016-09. As a result of the enactment of the Tax Act in December 2017, we recognized a charge of $56 million, or $2.96 per share, in the second quarter of fiscal 2018. Our reported tax rate, which includes the charge, was 465.0% for the second quarter of fiscal 2018, and 231.4% for the first half of fiscal 2018. The adjusted non-GAAP effective tax rate, excluding the Tax Act related charge and certain discrete tax items, was 28.0% and 28.2% for the three and six months ended December 31, 2017.

11. Segment Information

We have determined that we operate in three identifiable industry segments: (a) security and inspection systems (Security division), (b) medical monitoring and diagnostic cardiology systems (Healthcare division) and (c) optoelectronic devices and manufacturing (Optoelectronics and Manufacturing division). We also have a corporate segment (Corporate) that includes executive compensation and certain other general and administrative expenses; expenses related to stock issuances and legal, audit and other professional service fees not allocated to industry segments. Both the Security and Healthcare divisions comprise primarily end-product businesses whereas the Optoelectronics and Manufacturing division primarily supplies components and subsystems to OEM customers, as well as the Security and Healthcare divisions. Sales between divisions are at transfer prices that approximate market values. All other accounting policies of the segments are the same as described in Note 1, Summary of Significant Accounting Policies of the Form 10-K for the fiscal year ended June 30, 2018.

The following tables set forth the results of operations and identifiable assets by industry segment (in thousands):

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Revenues (1) — by Segment: |  |  |  |  |  |  |  |  |
Security division |  | $ | 172,269 |  | $ | 188,684 |  | $ | 334,514 |  | $ | 358,644 |
Healthcare division |  | 52,506 |  | 51,559 |  | 98,035 |  | 89,832 |
Optoelectronics and Manufacturing division, including intersegment revenues |  | 63,886 |  | 72,019 |  | 122,812 |  | 142,973 |
Intersegment revenues elimination |  | (11,133 | ) | (9,057 | ) | (20,700 | ) | (21,995 | )
Total |  | $ | 277,528 |  | $ | 303,205 |  | $ | 534,661 |  | $ | 569,454 |

|  | Three Months Ended December 31, |  | Six Months Ended December 31, |
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |
Income (loss) from operations — by Segment: |  |  |  |  |  |  |  |  |
Security division |  | $ | 22,471 |  | $ | 26,063 |  | $ | 45,164 |  | $ | 49,113 |
Healthcare division |  | 603 |  | 2,209 |  | 1,450 |  | 334 |
Optoelectronics and Manufacturing division |  | 4,502 |  | 8,067 |  | 9,677 |  | 14,892 |
Corporate |  | (9,118 | ) | (4,560 | ) | (17,871 | ) | (15,911 | )
Eliminations (2) |  | (311 | ) | (72 | ) | (879 | ) | (464 | )
Total |  | $ | 18,147 |  | $ | 31,707 |  | $ | 37,541 |  | $ | 47,964 |

|  | June 30, 2018 |  | December 31, 2018 |
Assets — by Segment: |  |  |  |  |
Security division |  | $ | 804,527 |  | $ | 804,390 |
Healthcare division |  | 167,611 |  | 161,521 |
Optoelectronics and Manufacturing division |  | 220,373 |  | 246,076 |
Corporate |  | 66,453 |  | 89,220 |
Eliminations (2) |  | (3,273 | ) | (3,530 | )
Total |  | $ | 1,255,691 |  | 1,297,677 |

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(1) For each of the three and six months ended December 31, 2017, one customer, Servicio de Administactión Tributaria (“SAT”) in Mexico, accounted for 12% of total net revenues. For the three and six months ended December 31, 2018, no customer accounted for greater than 10% of total net revenues.

(2) Eliminations within operating income primarily reflect the change in the elimination of intercompany profit in inventory not-yet-realized. Eliminations in assets reflect the amount of intercompany profits in inventory as of the balance sheet date. Such intercompany profit will be realized when inventory is shipped to the external customers of the Security and Healthcare divisions.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

In this report, “OSI”, the “Company”, “we”, “us”, “our” and similar terms refer to OSI Systems, Inc. together with our wholly-owned subsidiaries.

This management’s discussion and analysis of financial condition as of December 31, 2018 and results of operations for the three and six months ended December 31, 2018 should be read in conjunction with management’s discussion and analysis of financial condition and results of operations included in our Annual Report on Form 10-K for the year ended June 30, 2018.

Forward-Looking Statements

This report contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements relate to current expectations, beliefs, and projections concerning matters that are not historical facts. Words such as “project,” “believe,” “anticipate,” “plan,” “expect,” “intend,” “may,” “should,” “will,” “would,” and similar words and expressions are intended to identify forward-looking statements. The expectations, beliefs, and projections reflected in the forward-looking statements may prove to be inaccurate, and actual results may differ materially from those reflected in such forward-looking statements. Important factors that could cause our actual results to differ materially from those expectations are disclosed in this report, our Annual Report on Form 10-K for the fiscal year ended June 30, 2018 (including Part I, Item 1, “Business,” Part I, Item 1A, “Risk Factors” and Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations”), and other documents filed by us from time to time with the SEC. Such factors, of course, do not include all factors that might affect our business and financial condition. Although we believe that the assumptions upon which our forward-looking statements are based are reasonable, such assumptions could prove to be inaccurate and actual results could differ materially from those expressed in or implied by the forward-looking statements. For example, we could be exposed to a variety of negative consequences as a result of delays related to the award of domestic and international contracts; failure to secure the renewal of key customer contracts; delays in customer programs; delays in revenue recognition related to the timing of customer acceptance; unanticipated impacts of sequestration and other U.S. Government budget control provisions; changes in domestic and foreign government spending, budgetary, procurement and trade policies adverse to our businesses; global economic uncertainty; unfavorable currency exchange rate fluctuations; effect of changes in tax legislation; market acceptance of our new and existing technologies, products and services; our ability to win new business and convert any orders received to sales within the fiscal year; enforcement actions in respect of any noncompliance with laws and regulations including export control and environmental regulations and the matters that are the subject of some or all of our ongoing investigations and compliance reviews, contract and regulatory compliance matters, and actions, if brought, resulting in judgments, settlements, fines, injunctions, debarment or penalties, and other risks and uncertainties, including, but not limited to, those detailed herein and from time to time in our other SEC filings, which could have a material and adverse impact on our business, financial condition and results of operations. All forward-looking statements contained in this report are qualified in their entirety by this statement. Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this report may not occur, and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Investors should not place undue reliance on forward-looking statements as a prediction of actual results. We undertake no obligation other than as may be required under securities laws to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Executive Summary

We are a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications. We sell our products and provide related services in diversified markets, including homeland security, healthcare, defense and

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aerospace. We have three operating divisions: (a) Security, providing security and inspection systems and turnkey security screening solutions; (b) Healthcare, providing patient monitoring and diagnostic cardiology systems; and (c) Optoelectronics and Manufacturing, providing specialized electronic components for our Security and Healthcare divisions, as well as to third parties for applications in the defense and aerospace markets, among others.

Security Division. Through our Security division, we provide security screening products and services globally, as well as turnkey security screening solutions. These products and services are used to inspect baggage, parcels, cargo, people, vehicles and other objects for weapons, explosives, drugs, radioactive and nuclear materials and other contraband. Revenues from our Security division accounted for 63% of our total consolidated revenues for each of the six months ended December 31, 2017 and 2018.

Healthcare Division. Through our Healthcare division, we design, manufacture, market and service patient monitoring and diagnostic cardiology systems globally for sale primarily to hospitals and medical centers. Our products monitor patients in critical, emergency and perioperative care areas of the hospital and provide information, through wired and wireless networks, to physicians and nurses who may be at the patient’s bedside, in another area of the hospital or even outside the hospital. Revenues from our Healthcare division accounted for 18% and 16% of our total consolidated revenues for the six months ended December 31, 2017 and 2018, respectively.

Optoelectronics and Manufacturing Division. Through our Optoelectronics and Manufacturing division, we design, manufacture and market optoelectronic devices and flex circuits and provide electronics manufacturing services globally for use in a broad range of applications, including aerospace and defense electronics, security and inspection systems, medical imaging and diagnostics, telecommunications, office automation, computer peripherals, industrial automation, automotive diagnostic systems, and consumer products. We also provide our optoelectronic devices and electronics manufacturing services to OEM customers, and our own Security and Healthcare divisions. Revenues from external customers in our Optoelectronics and Manufacturing division accounted for 19% and 21% of our total consolidated revenues for the six months ended December 31, 2017 and 2018, respectively.

Acquisition Activity. During the six months ended December 31, 2018, we (through our Optoelectronics and Manufacturing division) acquired an optoelectronics solutions business for $17.5 million, plus up to $1.0 million in potential earnout consideration, and also completed an acquisition of a small services company in our Security division. The acquisitions were financed with cash on hand and borrowings under our existing revolving bank line of credit.

Trends and Uncertainties

The following is a discussion of certain trends and uncertainties that we believe have and may continue to influence our results of operations.

Global Economic Considerations. Global macroeconomic factors, coupled with the U.S. political climate, have created uncertainty and impacted demand for certain of our products and services primarily in our Security and Healthcare divisions. Additionally, the current U.S. government shut-down has contributed to economic uncertainty within the U.S. and may impact the timing of payments, orders, shipments and product acceptance from certain of our customers. Further, the current status and potential outcomes of Brexit negotiations has contributed to the global economic uncertainty and could have an adverse impact on our UK business, including our orders and sales operations and personnel in the UK. We do not know how long this uncertainty will continue. Therefore, we expect that there may be a period of delayed or deferred purchasing by our customers. These factors could have a material negative effect on our business, results of operations and financial condition. Additionally, our international operations provide a significant portion of our total revenue and expenses. Many of these revenue and expenses are denominated in currencies other than the U.S. dollar. As a result, changes in foreign exchange rates may significantly affect revenue and expenses.

Global Trade. The current domestic and international political environment, including existing and potential changes to U.S. and foreign policies related to global trade and tariffs as well as the current U.S. government shut-down, have resulted in uncertainty surrounding the future state of the global economy. Further, the U.S. government has also recently announced that sanctions would be imposed against certain businesses and individuals in select countries. Additional changes may require us to modify our current business practices and could have a material adverse effect on our financial statements in any particular reporting period.

Healthcare Considerations. The results of our operations have been adversely impacted by difficulties associated with product launches in our Healthcare division. These issues may continue to adversely impact our results of operations for additional periods. Additionally, there have been numerous efforts advanced by the Trump administration and Congress to repeal and replace or modify the Affordable Care Act, which has created uncertainty in the healthcare industry that has adversely impacted, and may continue to adversely impact, our results of operations.

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European Union Threat Detection Standards. The European Union has implemented regulations for all airports within the EU to have hold baggage screening systems that are compliant with the European Civil Aviation Conference (ECAC) Standard 3 beginning in 2020. However, this deadline could potentially be delayed. Our Security division’s real time tomography (RTT) product has passed the ECAC explosive detection system Standard 3 threat detection requirement.

Government Policies. Our net income could be affected by changes in U.S. or foreign government tax policies, such as the Tax Act, the implications and uncertainties of which are described elsewhere in this report. Additionally, we attempt to manage our currency exposure in certain countries. Changes in government policies in these areas might cause an impact to our financial condition and results of operations.

Results of Operations for the Three Months Ended December 31, 2017 (Q2 2018) Compared to Three Months Ended December 31, 2018 (Q2 2019) (amounts in millions)

Net Revenues

The table below and the discussion that follows are based upon the way in which we analyze our business. See Note 11 to the condensed consolidated financial statements for additional information about our business segments.

|  | Q2 2018 |  | % of Net Revenues |  | Q2 2019 |  | % of Net Revenues |  | $ Change |  | % Change |
Security |  | $ | 172.3 |  | 62 | % | $ | 188.7 |  | 62 | % | $ | 16.4 |  | 10 | %
Healthcare |  | 52.5 |  | 19 | % | 51.6 |  | 17 | % | (0.9 | ) | (2 | )%
Optoelectronics / Manufacturing |  | 52.7 |  | 19 | % | 62.9 |  | 21 | % | 10.2 |  | 19 | %
Total net revenues |  | $ | 277.5 |  | 100 | % | $ | 303.2 |  | 100 | % | $ | 25.7 |  | 9 | %

Revenues for the Security division during the three months ended December 31, 2018 increased as a result of increased sales of cargo and vehicle inspection products and explosive detection systems. These increases were partially offset by decreased service revenue, including a reduction in revenue from our turnkey business as a result of the reduced revenues from the current contract with SAT in Mexico entered into in January 2018.

Revenues for the Healthcare division for the three months ended December 31, 2018 increased by 2.5% in our core patient monitoring, cardiology and supplies and accessories product lines. This increase was offset by the de-emphasis of sales in our anesthesia product line and in an underperforming sales channel that we exited during the second fiscal quarter, resulting in an overall 2% decrease in net revenues.

Revenues for the Optoelectronics and Manufacturing division for the three months ended December 31, 2018 increased as a result of two acquisitions completed during calendar 2018 and strength in our commercial optoelectronics business.

Gross Profit

|  | Q2 2018 |  | % of Net Revenues |  | Q2 2019 |  | % of Net Revenues |
Gross profit |  | $ | 101.6 |  | 36.6 | % | $ | 110.3 |  | 36.4 | %

Gross profit during the three months ended December 31, 2018 increased as a result of the growth in net revenues. The gross margin for the quarter ended December 31, 2018 was relatively consistent with that of the same period in fiscal 2018.

Operating Expenses

|  | Q2 2018 |  | % of Net Revenues |  | Q2 2019 |  | % of Net Revenues |  | $ Change |  | % Change |
Selling, general and administrative |  | $ | 60.1 |  | 21.7 | % | $ | 67.1 |  | 22.1 | % | $ | 7.0 |  | 12 | %
Research and development |  | 15.1 |  | 5.4 | % | 12.8 |  | 4.2 | % | (2.3 | ) | (15 | )%
Impairment, restructuring and other charges |  | 8.3 |  | 3.0 | % | (1.3 | ) | (0.4 | )% | (9.6 | ) | (116 | )%
Total operating expenses |  | $ | 83.5 |  | 30.1 | % | $ | 78.6 |  | 25.9 | % | $ | (4.9 | ) | (6 | )%

Selling, general and administrative. Selling, general and administrative (SG&A) expenses consist primarily of compensation paid to sales, marketing and administrative personnel, professional service fees, third party commissions and marketing expenses. SG&A

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expense increased primarily within our Security division related to commissions as well as increased stock-based compensation expense due to the modification of certain grants in this division.

Research and development. Research and development (R&D) expenses include research related to new product development and product enhancement expenditures. The decrease in R&D spending during the three months ended December 31, 2018 reflected reduced spending in our Security division due to consolidation following an acquisition completed in the prior year and reduced spending for ongoing engineering projects. Further, R&D expense decreased in our Healthcare division due to the de-emphasis of the anesthesia product line and related development programs.

Impairment, restructuring and other charges. Impairment, restructuring and other charges generally consist of the write-down of assets that we believe are permanently impaired, charges related to reductions in our workforce, other opportunities to improve operational efficiency, costs related to acquisition activity, legal charges and other non-recurring charges. In the second quarter of fiscal 2019, we recovered certain legal costs through insuranace reimbursement resulting in a net credit of $4.6 million. This benefit was partially offset by $3.3 million of employee termination and business exit costs for restructuring activities in our Healthcare division.

Such charges in the prior-year period included: (i) $3.1 million of impairment of intangibles, primarily trademarks, related to two acquired brands that have been merged into existing product lines as well as assets associated with abandoned product lines; (ii) $4.2 million of accrued costs related to estimated legal settlements; (iii) $0.4 million of acquisition costs; and (iv) $0.5 million of employee termination and facility closure costs for restructuring activities.

Other Income and Expenses

Interest expense, net. For the three months ended December 31, 2018, interest and other expense, net was $5.6 million as compared to $5.3 million in the comparable prior-year period. This increase was driven primarily by a higher interest rate environment. Interest expense in the current and prior-year period included $1.9 million of non-cash interest expense related to the Notes (see Note 6 to the condensed consolidated financial statements for further discussion).

Income taxes. The effective tax rate for a particular period varies depending on a number of factors including (i) the mix of income earned in various tax jurisdictions, each of which applies a unique range of income tax rates and income tax credits, (ii) changes in previously established valuation allowances for deferred tax assets (changes are based upon our current analysis of the likelihood that these deferred tax assets will be realized), (iii) the level of non-deductible expenses, (iv) certain tax elections and (v) tax holidays granted to certain of our international subsidiaries. For the three months ended December 31, 2018, our income tax provision was $7.0 million, compared to $59.8 million for the comparable prior-year period, which included a tax charge of $56.2 million for the estimated impact of the Tax Act. The effective tax rate for the three months ended December 31, 2018 was 26.8% compared to 465.0% in the prior year period due to the impact of the Tax Act. Excluding the net impact of a $0.4 million discrete tax benefit, our adjusted non-GAAP effective tax rate for the three months ended December 31, 2018 was 28.3% compared to 28.0% in the prior-year period.

Results of Operations for the Six Months Ended December 31, 2017 (YTD Q2 2018) Compared to Six Months Ended December 31, 2018 (YTD Q2 2019) (amounts in millions)

Net Revenues

The table below and the discussion that follows are based upon the way in which we analyze our business. See Note 11 to the condensed consolidated financial statements for additional information about our business segments.

|  | YTD Q2 2018 |  | % of Net Revenues |  | YTD Q2 2019 |  | % of Net Revenues |  | $ Change |  | % Change |
Security |  | $ | 334.5 |  | 63 | % | $ | 358.7 |  | 63 | % | $ | 24.2 |  | 7 | %
Healthcare |  | 98.1 |  | 18 | % | 89.8 |  | 16 | % | (8.3 | ) | (8 | )%
Optoelectronics / Manufacturing |  | 102.1 |  | 19 | % | 121.0 |  | 21 | % | 18.9 |  | 19 | %
Total net revenues |  | $ | 534.7 |  | 100 | % | $ | 569.5 |  | 100 | % | $ | 34.8 |  | 7 | %

Revenues for the Security division for the six months ended December 31, 2018 increased as a result of increased sales of cargo and vehicle inspection systems and explosive detection systems. The increases in equipment sales were offset partially by declines in service revenues and checkpoint and explosive trace detection equipment revenues. Service revenue decreased primarily due to a reduction in revenue from our turnkey business as a result of the reduced revenues from the current contract with SAT in Mexico entered into in January 2018.

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Revenues for the Healthcare division for the six months ended December 31, 2018 decreased due to a reduction in patient monitoring and cardiology sales as a result of softness in the first fiscal quarter of 2019. In addition, sales decreased as a result of our de-emphasis of the anesthesia product line and due to an underperforming sales channel that we exited in the second fiscal quarter. These decreases were offset partially by an increase in supplies and accessories revenue.

Revenues for the Optoelectronics and Manufacturing division for the six months ended December 31, 2018 increased primarily as a result of businesses acquired during calendar 2018 and due to strong sales in our commercial optoelectronics business.

Gross Profit

|  | YTD Q2 2018 |  | % of Net Revenues |  | YTD Q2 2019 |  | % of Net Revenues |
Gross profit |  | $ | 192.9 |  | 36.1 | % | $ | 206.3 |  | 36.2 | %

Gross profit during the six months ended December 31, 2018 increased as a result of the growth in net revenues. The gross margin for the six months ended December 31, 2018 was relatively consistent with that of the same period in fiscal 2018.

Operating Expenses

|  | YTD Q2 2018 |  | % of Net Revenues |  | YTD Q2 2019 |  | % of Net Revenues |  | $ Change |  | % Change |
Selling, general and administrative |  | $ | 115.7 |  | 21.6 | % | $ | 128.8 |  | 22.6 | % | $ | 13.1 |  | 11 | %
Research and development |  | 30.2 |  | 5.6 | % | 26.6 |  | 4.7 | % | (3.6 | ) | (12 | )%
Impairment, restructuring and other charges |  | 9.4 |  | 1.8 | % | 2.9 |  | 0.5 | % | (6.5 | ) | (69 | )%
Total operating expenses |  | $ | 155.3 |  | 29.0 | % | $ | 158.3 |  | 27.8 | % | $ | 3.0 |  | 2 | %

Selling, general and administrative. SG&A increased primarily in our Security division related to commissions as well as increased stock-based compensation expense due to the modification of certain grants in this division, as well as due to acquisitions in our Optoelectronics and Manufacturing division.

Research and development. R&D spending during the six months ended December 31, 2018 decreased due to reduced spending in our Security division due to consolidation following an acquisition completed in the prior year and reduced spending for ongoing engineering projects. Further, R&D expense decreased in our Healthcare division due to the de-emphasis of the anesthesia product line and related development programs.

Impairment, restructuring and other charges. In the first half of fiscal 2019, we incurred restructuring and other charges of $3.6 million related to employee termination and business exit costs and $0.3 million in acquisition costs, which were partially offset by a net $1.0 million recovery of certain legal costs as a result of insurance reimbursements. Impairment, restructuring and other charges incurred in the prior year period include: (i) $3.1 million of impairment of intangibles, primarily trademarks, related to two acquired brands that have been merged into existing product lines as well as assets associated with abandoned product lines; (ii) $4.2 million of accrued charges related to estimated legal settlements; (iii) $1.1 million of acquisition costs; and (iv) $0.8 million of employee termination and facility closure costs for restructuring activities.

Other Income and Expenses

Interest expense, net. For the six months ended December 31, 2018, interest expense, net, was $11.0 million as compared to $9.5 million for the same prior-year period. This increase was driven by higher average debt balances and the impact of increased interest rates under our revolving credit facility. Interest expense included, $3.9 million and $3.7 million, respectively, of non-cash interest expense related to the Notes for the six months ended December 31, 2018 and 2017 (see Note 6 to the condensed consolidated financial statements for further discussion).

Income taxes. For the six months ended December 31, 2018, our income tax provision was $8.5 million, compared to $64.8 million for the comparable prior-year period. The prior year tax provision includes $56.2 million of discrete tax expense resulting from the enactment of the Tax Act and $0.4 million related to other discrete tax items. The effective tax rate for the six months ended December 31, 2018 was 23.0% compared to 231.4% in the prior period which includes the effect of the discreet tax item related to the enactment of the Tax Act. Excluding the net impact of discrete tax items, our adjusted non-GAAP effective tax rate for the six months ended December 31, 2018 was 28.2%, compared to 28.2% in the prior-year period.

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Liquidity and Capital Resources

Our principal sources of liquidity are our cash and cash equivalents, cash generated from operations and our credit facility. Cash and cash equivalents totaled $96.0 million as of December 31, 2018, an increase of 13% from $84.8 million as of June 30, 2018. During the six months ended December 31, 2018, we generated $40.8 million of cash flow from operations. We utilized cash from operations and borrowings from our revolving line of credit as follows: (i) $18.3 million for the acquisition of businesses; (ii) $13.2 million invested in capital expenditures and intangible and other assets; and (iii) $34.0 million for share repurchases and taxes paid related to the net share settlement of equity awards. If we continue to net settle equity awards, we will use additional cash to pay tax withholding obligations in connection with such settlements. We currently anticipate that our available funds, credit facilities and cash flow from operations will be sufficient to meet our operational cash needs for the next 12 months and the foreseeable future.

We have a five-year revolving credit facility maturing in December 2021 that allows us to borrow up to $525 million. As of December 31, 2018, there was $149.0 million outstanding under the revolving credit facility and $58.9 million outstanding under the letters of credit sub-facility.

Cash Provided by Operating Activities. Cash flows from operating activities can fluctuate significantly from period to period, as net income, adjusted for non-cash items, and working capital fluctuations impact cash flows. During the six months ended December 31, 2018, we generated cash from operations of $40.8 million compared to $84.7 million in the prior-year period. Cash flow from operating activities during the first six months of fiscal 2019 primarily consisted of net income of $28.5 million, adjusted for certain non-cash items, including total depreciation and amortization of $28.3 million, stock-based compensation expense of $13.6 million, and amortization of debt discount and issuance costs of $4.5 million, and was reduced by the net impact of changes in operating assets and liabilities, which decreased cash by $31.8 million. Cash flow from operating activities during the first six months of fiscal 2018 primarily consisted of net loss of $36.8 million, adjusted for certain non-cash items, including total depreciation and amortization of $41.7 million, stock-based compensation expense of $11.7 million, amortization of debt discount and issuance costs of $4.3 million, change in deferred taxes of $50.7 as a result of the Tax Act and impairment charges of $3.1 million, and was increased by the net impact of changes in operating assets and liabilities, which provided cash of $9.1 million.

Cash Used in Investing Activities. Net cash used in investing activities was $31.5 million for the six months ended December 31, 2018 as compared to $116.7 million for the six months ended December 31, 2017. During the six months ended December 31, 2018, we used cash of $17.5 million for the acquisition of an optoelectronics solutions business and $0.8 million for a services business in our Security division, and $12.6 million in capital expenditures. During the six months ended December 31, 2017, we used cash of $83.6 million for acquisitions, consisting primarily of the ETD business, and $32.0 million in capital expenditures, including $19.8 million to purchase the AS&E headquarters facility.

Cash Provided by Financing Activities. Net cash provided by financing activities was $3.1 million for the six months ended December 31, 2018, compared to $74.3 million for the six months ended December 31, 2017. During the six months ended December 31, 2018, our primary source of financing was $36.0 million borrowed under our revolving credit facility. This source of funds was partially offset by $34.0 million used for share repurchases and taxes paid related to the net share settlement of equity awards. During the six months ended December 31, 2017, our primary source of financing was $92 million borrowed under our revolving credit facility. This source of funds was partially offset by $19.8 million used for taxes paid related to the net share settlement of equity awards.

Borrowings

See Note 6 to the condensed consolidated financial statements for discussion regarding our revolving credit facility and our Notes.

Cash Held by Foreign Subsidiaries

Our cash and cash equivalents totaled $96.0 million at December 31, 2018. Of this amount, approximately 73% was held by our foreign subsidiaries and subject to repatriation tax considerations. These foreign funds were located primarily in the United Kingdom, Malaysia, India and Mexico, and to a lesser extent in Canada, Singapore and Germany among others. We intend to permanently reinvest certain earnings from foreign operations, and we currently do not anticipate that we will need this cash in foreign countries to fund our U.S. operations. In the event we repatriate cash from certain foreign operations and if withholding taxes have not been previously provided on the related earnings, we would provide for withholding taxes at the time we change our intention with regard to the reinvestment of those earnings.

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Issuer Purchases of Equity Securities

The following table contains information about the shares acquired during the quarter ended December 31, 2018:

|  | Total number of shares (or units) purchased |  | Average price paid per share (or unit) |  | Total number of shares (or units) purchased as part of publicly announced plans or programs |  | Maximum number that may yet be purchased under the plans or programs (1) |
October 1, 2018 to October 31, 2018 |  | 47,804 |  | $ | 69.25 |  | 47,804 |  | 699,073 |
November 1, 2018 to November 30, 2018 |  | 54,585 |  | $ | 73.42 |  | 54,585 |  | 644,488 |
December 1, 2018 to December 31, 2018 |  | 81,781 |  | $ | 71.74 |  | 81,781 |  | 562,707 |
|  | 184,170 |  | $ | 71.59 |  | 184,170 |  |  |

(1) In March 2018, our Board of Directors authorized a stock repurchase program of up to one million shares. This program does not have an expiration date. Upon repurchase, the shares are restored to the status of authorized but unissued, and we record them as a reduction in the number of shares of common stock issued and outstanding in the consolidated financial statements.

Dividend Policy

We have not paid any cash dividends since the consummation of our initial public offering in 1997 and we do not currently intend to pay any cash dividends in the foreseeable future. Our Board of Directors will determine the payment of future cash dividends, if any. Certain of our current bank credit facilities restrict the payment of cash dividends and future borrowings may contain similar restrictions.

Contractual Obligations

During the six months ended December 31, 2018, there were no material changes outside the ordinary course of business in the information regarding specified contractual obligations contained in our Annual Report on Form 10-K for the fiscal year ended June 30, 2018. See Notes 6 and 9 to the condensed consolidated financial statements for additional information regarding our current contractual obligations.

Off Balance Sheet Arrangements

As of December 31, 2018, we did not have any significant off-balance sheet arrangements, as defined in Item 303(a)(4) of Regulation S-K.

New Accounting Pronouncements

For information with respect to recent accounting pronouncements and the potential impact of those pronouncements on our condensed consolidated financial statements, see Note 1 to the condensed consolidated financial statements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

For the six months ended December 31, 2018, no material changes occurred with respect to market risk as disclosed in our Annual Report on Form 10-K for the fiscal year ended June 30, 2018.

Market Risk

We are exposed to certain market risks, which are inherent in our financial instruments and arise from transactions entered into in the normal course of business. We may enter into derivative financial instrument transactions in order to manage or reduce market risk in connection with specific foreign currency denominated transactions. We do not enter into derivative financial instrument transactions for speculative purposes.

Foreign Currency

Our international operations are subject to certain opportunities and risks, including foreign currency fluctuations and governmental actions. We conduct business in more than 20 countries. We closely monitor our operations in each country in which we do business

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and seek to adopt appropriate strategies that are responsive to changing economic and political environments, and to fluctuations in foreign currencies. Weaknesses in the currencies of some of the countries in which we do business are often offset by strengths in others. Foreign currency financial statements are translated into U.S. dollars at period-end rates, except that revenues, costs and expenses are translated at average rates during the reporting period. We include gains and losses resulting from foreign currency transactions in income, while we exclude those resulting from translation of financial statements from income and include them as a component of accumulated other comprehensive loss. Transaction gains and losses, which were included in our condensed consolidated statements of operations, amounted to a loss of $0.2 million and a gain of $1.4 million during the three months ended December 31, 2017 and 2018, respectively. We recognized a loss of $0.3 million and a gain of $1.1 million during the six months ended December 31, 2017 and 2018, respectively. Furthermore, a 10% appreciation of the U.S. dollar relative to each of the local currencies would have resulted in a net increase in our operating income of approximately $2.3 million in the second quarter of fiscal 2019. Conversely, a 10% depreciation of the U.S. dollar relative to each of the local currencies would have resulted in a net decrease in our operating income of approximately $2.3 million in the second quarter of fiscal 2019.

Use of Derivatives

Our current use of derivatives consists of an interest rate swap agreement. As discussed in Note 1 to the condensed consolidated financial statements, we had an interest rate swap of $1.3 million outstanding as of December 31, 2018.

Importance of International Markets

International markets provide us with significant growth opportunities, but our financial results in subsequent periods could be adversely affected by periodic economic downturns in different regions of the world, changes in trade policies or tariffs, civil or military conflict and other political instability. We monitor economic and currency conditions around the world to evaluate whether there may be any significant effect on our international sales in the future. Due to our overseas investments and the necessity of dealing with local currencies in our foreign business transactions, we are at risk with respect to foreign currency fluctuations.

Inflation

We do not believe that inflation had a material impact on our results of operations.

Interest Rate Risk

We are subject to interest rate risk on our borrowings under our bank lines of credit. Consequently, our interest expense fluctuates with changes in interest rates as we borrow amounts under these facilities.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of December 31, 2018, the end of the period covered by this report, our management, including our Chief Executive Officer and our Chief Financial Officer, reviewed and evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) or 15d-15(e) of the Exchange Act). Based upon management’s review and evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this Quarterly Report on Form 10-Q, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the SEC and is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the second quarter of fiscal 2019 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud within the Company have been detected.

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PART II — OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The material legal proceedings in which we are involved are discussed in Note 9, “Commitments and Contingencies,” to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q, and are hereby incorporated by reference.

ITEM 1A. RISK FACTORS

The discussion of our business and operations in this Quarterly Report on Form 10-Q should be read together with the risk factors contained in our Annual Report on Form 10-K for the fiscal year ended June 30, 2018, filed with the SEC on August 28, 2018, which describe various risks and uncertainties which could materially affect our business, financial condition or future results of operations. There have been no material changes to the risk factors included in our Annual Report on Form 10-K. The risks described in our Annual Report on Form 10-K are not the only risks we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and results of operations.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

See Issuer Purchases of Equity Securities discussion under Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations, which is hereby incorporated by reference.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable

ITEM 5. OTHER INFORMATION

None

ITEM 6. EXHIBITS

2.1 |  | Equity Purchase Agreement, dated as of May 31, 2017, by and among OSI Systems, Inc., OSI (Holdings) Company Limited, Smiths Detection, LLC, Smiths Detection United Kingdom Limited, Smiths Detection (Australia) Pty Ltd, and Smiths Detection Group Limited (1)
31.1 |  | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2 |  | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1 |  | Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2 |  | Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS |  | XBRL Instance Document.
101.SCH |  | XBRL Taxonomy Extension Schema Document.
101.CAL |  | XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF |  | XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB |  | XBRL Taxonomy Extension Label Linkbase Document.
101.PRE |  | XBRL Taxonomy Extension Presentation Linkbase Document.

(1) Previously filed with our Current Report on Form 8-K filed on June 1, 2017.

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Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized, in the City of Hawthorne, State of California on the 25th day of January 2019.

| OSI SYSTEMS, INC.
| By: | /s/ Deepak Chopra
|  | Deepak Chopra
|  | President and Chief Executive Officer
| By: | /s/ Alan Edrick
|  | Alan Edrick
|  | Executive Vice President and Chief Financial Officer

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