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INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities: |  |
Net income (loss) | $ (4,272) | $ 8,015
Adjustments required to reconcile net income (loss) to net cash provided by operating activities: |  |
Depreciation | 1,190 | 923
Amortization of intangible assets | 635 | 618
Equity-based compensation | 5,616 | 4,127
Realized (gain) loss, net on sale of available-for-sale marketable securities | (2) | 40
Amortization of premiums on available-for-sale marketable securities | 430 | 619
Unrealized foreign exchange loss | 78 | 29
Changes in operating assets and liabilities: |  |
Trade receivables and accrued revenues | 7,694 | 4,655
Prepaid expenses and other assets | (3,895) | (2,382)
Accrued interest on bank deposits | (533) | 323
Deferred tax, net | (677) | (490)
Trade payables | 533 | (285)
Deferred revenues | (1,682) | (2,870)
Accrued expenses and other payables | (289) | 339
Accrued payroll and related benefits | (1,277) | (1,675)
Income taxes payable | 78 | (1,475)
Accrued severance pay, net | 174 | 41
Net cash provided by operating activities | 3,801 | 10,552
Cash flows from investing activities: |  |
Purchase of property and equipment | (2,250) | (2,275)
Purchase of intangible assets | (1,690) |
Investment in bank deposits | (11,396) | (30,757)
Proceeds from bank deposits | 11,065 | 27,050
Investment in available-for-sale marketable securities | (13,834) | (27,825)
Proceeds from maturity of available-for-sale marketable securities | 9,392 | 3,895
Proceeds from sale of available-for-sale marketable securities | 3,351 | 12,196
Net cash used in investing activities | (5,362) | (17,716)
Cash flows from financing activities: |  |
Purchase of treasury stock | (10,434) |
Proceeds from exercise of stock-based awards | 1,062 | 5,741
Net cash provided by (used in) financing activities | (9,372) | 5,741
Effect of exchange rate changes on cash and cash equivalents | (106) | 125
Decrease in cash and cash equivalents | (11,039) | (1,298)
Cash and cash equivalents at the beginning of the period | 21,739 | 18,401
Cash and cash equivalents at the end of the period | 10,700 | 17,103
Supplemental information of cash-flow activities: |  |
Income and withholding taxes, net of refunds | 2,730 | $ 2,505
Non-cash transactions: |  |
Cumulative effect of adoption of new accounting standard | 8,555 |
Property and equipment purchases incurred but unpaid at period end | 114 |
Intangible assets purchases incurred but unpaid at period end | $ 750 |

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- Definition Amount of cash inflow from issuance of shares under share-based compensation arrangement. Issuance includes, but is not limited to, exercise of stock options and similar instruments. + 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 Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3151-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -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 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + 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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