INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (2,182)	$ 4,107
Adjustments required to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	576	443
Amortization of intangible assets	359	309
Equity-based compensation	2,771	1,949
Realized (gain) loss, net on sale of available-for-sale marketable securities	(4)	38
Amortization of premiums on available-for-sale marketable securities	236	304
Unrealized foreign exchange (gain) loss	(73)	27
Changes in operating assets and liabilities:
Trade receivables and accrued revenues	2,366	1,266
Prepaid expenses and other assets	(1,619)	(1,738)
Accrued interest on bank deposits	(326)	114
Deferred tax, net	(355)	(355)
Trade payables	102	(220)
Deferred revenues	574	25
Accrued expenses and other payables	(780)	(151)
Accrued payroll and related benefits	(129)	63
Accrued severance pay, net	267	108
Net cash provided by operating activities	1,783	6,289
Cash flows from investing activities:
Purchase of property and equipment	(455)	(1,435)
Purchase and capitalization of intangible assets	(850)
Investment in bank deposits	(1,286)	(21,000)
Proceeds from bank deposits	1,298	10,500
Investment in available-for-sale marketable securities	(9,505)	(10,696)
Proceeds from maturity of available-for-sale marketable securities	3,762	2,243
Proceeds from sale of available-for-sale marketable securities	2,279	5,931
Net cash used in investing activities	(4,757)	(14,457)
Cash flows from financing activities:
Purchase of treasury stock	(1,459)
Proceeds from exercise of stock-based awards	1,062	2,363
Net cash provided by (used in) financing activities	(397)	2,363
Effect of exchange rate changes on cash and cash equivalents	14	25
Decrease in cash and cash equivalents	(3,357)	(5,780)
Cash and cash equivalents at the beginning of the period	21,739	18,401
Cash and cash equivalents at the end of the period	18,382	12,621
Supplemental information of cash-flow activities:
Income and withholding taxes, net of refunds	1,355	1,280
Non-cash transactions:
Cumulative effect of adoption of new accounting standard	8,555
Property, Plant and Equipment
Non-cash transactions:
Intangible assets purchases incurred but unpaid at period end		$ 29
Finite-Lived Intangible Assets
Non-cash transactions:
Intangible assets purchases incurred but unpaid at period end	$ 1,350