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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash flows from operating activities: |  |  |
Net income | $ 4,103 | $ 4,614 | $ 4,583
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 622 | 640 | 541
Stock-based compensation | 558 | 689 | 915
Reversal of reserve for uncertain tax positions |  | (1,914) |
Gain on sale of patent assets |  | (43) | (2,127)
Amortization of premium (discount) on investments | (13) | (11) | (3)
(Gain)/loss on sale of investments |  | (12) | 59
Deferred tax benefit (expense) on other comprehensive income | (24) | 18 | (66)
Increase (decrease) from changes in assets and liabilities: |  |  |
Accounts receivable | 1,727 | (1,124) | 963
Inventories |  | 2 | 1,599
Prepaid expenses and other current assets | 215 | (82) | 294
Deferred tax assets | (79) | (27) | 173
Accounts payable | (99) | (24) | (1,258)
Accrued expenses | 123 | 132 | 23
Accrued income taxes | (236) | 236 |
Deferred revenue | (3,083) | 3,590 | 560
Net cash provided by operating activities | 3,814 | 6,684 | 6,256
Cash flows from investing activities: |  |  |
Purchases of property and equipment | (87) | (127) | (135)
Sales of investments |  | 529 | 1,432
Proceeds from sale of patent assets, net |  | 43 | 2,127
Purchase of other assets |  | (320) |
Net cash provided by (used in) investing activities | (87) | 125 | 3,424
Cash flows from financing activities: |  |  |
Proceeds from issuance of common stock | 44 | 40 | 508
Payment of dividends |  |  | (39,905)
Excess tax benefits from stock-based compensation | 701 | 554 | 1,247
Payments made for taxes of employees who surrendered shares related to unrestricted stock | (136) | (156) | (205)
Repurchase of common stock | (3,655) |  |
Net cash provided by (used in) financing activities | (3,046) | 438 | (38,355)
Increase/(decrease) in cash and cash equivalents | 681 | 7,247 | (28,675)
Cash and cash equivalents, beginning of year | 51,232 | 43,985 | 72,660
Cash and cash equivalents, end of year | 51,913 | 51,232 | 43,985
Supplemental disclosure: |  |  |
Cash paid for income taxes | $ 1,553 | $ 571 | $ 1,018

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- Definition The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + 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=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + 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=66902209&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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