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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities |  |  |
Net income | $ 14,637 | $ 21,714 | $ 13,137
Adjustments required to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 3,293 | 3,799 | 3,856
Write-down of obsolete inventory | 6,211 | 2,918 | 3,170
Discount on marketable securities, net | 32 | 217 | 358
Share-based compensation expense | 2,424 | 2,425 | 1,550
Deferred taxes, net | 5 | 453 | (260)
Changes in assets and liabilities: |  |  |
Accounts receivable - trade | 16,985 | (13,237) | (4,007)
Accounts receivable - other | (3,384) | (2,475) | (1,832)
Accounts receivable - related parties | 261 | (208) | 56
Change in liability for employees' severance benefits, net | (79) | 171 | 126
Inventories | 2,540 | (10,287) | (21,426)
Trade accounts payable | 3,059 | 1,698 | 1,809
Other accounts payable and accrued expenses | (314) | (1,144) | 1,098
Contingent consideration benefit |  | (4,642) | (334)
Accounts payable - related parties | 8 | 6 | (8)
Net cash provided by (used in) operating activities | 45,678 | 1,408 | (2,707)
Cash flows from investing activities |  |  |
Purchase of property, plant and equipment | (1,345) | (1,690) | (1,441)
Investment in intangible assets | (1,022) | (11) |
Proceeds from maturity of marketable securities | 7,750 | 16,175 | 8,575
Purchases of marketable securities | (41,670) | (5,961) |
Net cash provided by (used in) investing activities | (36,287) | 8,513 | 7,134
Cash flows from financing activities |  |  |
Exercise of options | 288 | 2,651 | 952
Dividend |  | (7,382) | (7,312)
Payment made in connection with contingent consideration |  |  | (4,463)
Net cash provided by (used in) financing activities | 288 | (4,731) | (10,823)
Effect of exchange rate changes on cash balances held | 108 | (86) | 135
Increase (decrease) in cash and cash equivalents | 9,787 | 5,104 | (6,261)
Cash and cash equivalents at beginning of year | 17,021 | 11,917 | 18,178
Cash and cash equivalents at end of year | 26,808 | 17,021 | 11,917
Supplementary cash flow information Non-cash transactions: |  |  |
Investments in PPE and intangible assets | 146 | 119 | 39
Supplementary cash flow information Cash paid during the year for: |  |  |
Income taxes | $ 3,260 | $ 4,584 | $ 4,648

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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