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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Cash flows from operating activities: |  |
Net income | $ 16,175 | $ 6,651
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation and amortization | 6,374 | 3,844
Non-cash interest expense | 2,958 | 1,320
Stock-based compensation expense | 4,845 | 3,341
Deferred tax expense | (13,062) | 326
Loss on revaluation of contingent consideration |  | 3,317
Gain on sale of fixed assets |  | (15)
Loss on disposal of assets | 64 | 25
Changes in assets and liabilities: |  |
Accounts receivable | (8,472) | (3,270)
Other receivables | 196 | 20
Inventories | 699 | (6,457)
Prepaid expenses and other current assets | (739) | 820
Other assets | (704) |
Accounts payable | 159 | (1,918)
Accrued liabilities | (6,089) | (2,389)
Long-term liabilities | (171) | (48)
Net cash provided by operating activities | 2,233 | 5,567
Cash flows from investing activities: |  |
Purchases of marketable securities | (48) | (21,394)
Redemptions of marketable securities | 19,600 | 19,700
Proceeds from sale of fixed assets |  | 45
Purchases of property, plant and equipment | (3,686) | (3,462)
Net cash used in investing activities | (97,075) | (13,878)
Cash flows from financing activities: |  |
Proceeds from issuance of common stock, net of issuance costs | 129,309 |
Proceeds from issuance of convertible senior notes, net of issuance costs |  | 111,070
Exercise of stock options | 2,035 | 1,630
Payment of contingent considerations | (1,702) | (498)
Net cash provided by financing activities | 129,642 | 112,202
Effect of exchange rate changes on cash and cash equivalents | 2,633 | (332)
Net increase in cash and cash equivalents | 37,433 | 103,559
Cash and cash equivalents, beginning of period | 122,233 | 54,092
Cash and cash equivalents, end of period | 159,666 | 157,651
Supplemental disclosure of non-cash activities: |  |
Income taxes paid | 3,555 | 2,888
Interest paid | 1,222 |
Payment of contingent consideration in common stock | 1,062 | 875
Spectrum Inc. |  |
Cash flows from investing activities: |  |
Acquisition of assets, net of cash received | (112,941) |
Supplemental disclosure of non-cash activities: |  |
Stock tendered for acquisition of assets | $ 247,575 |
Atoll GmbH |  |
Cash flows from investing activities: |  |
Acquisition of assets, net of cash received |  | (8,767)
Supplemental disclosure of non-cash activities: |  |
Stock tendered for acquisition of assets |  | $ 14,135

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- Definition The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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