INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 4,107	$ 1,800
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation	443	298
Amortization of intangible assets	309	309
Equity-based compensation	1,949	1,474
Realized loss, net on sale of available-for-sale marketable securities	38	30
Amortization of premiums on available-for-sale marketable securities	304	249
Unrealized foreign exchange (gain) loss	27	(6)
Changes in operating assets and liabilities:
Trade receivables	1,266	(2,637)
Prepaid expenses and other assets	(1,738)	(462)
Accrued interest on bank deposits	114	(272)
Deferred tax, net	(355)	(355)
Trade payables	(220)	716
Deferred revenues	25	(1,334)
Accrued expenses and other payables	(11)	293
Accrued payroll and related benefits	63	(540)
Income taxes payable	(140)	467
Accrued severance pay, net	108	206
Net cash provided by operating activities	6,289	236
Cash flows from investing activities:
Purchase of property and equipment	(1,435)	(411)
Investment in bank deposits	(21,000)
Proceeds from bank deposits	10,500	1,113
Investment in available-for-sale marketable securities	(10,696)	(15,434)
Proceeds from maturity of available-for-sale marketable securities	2,243	2,975
Proceeds from sale of available-for-sale marketable securities	5,931	6,408
Net cash used in investing activities	(14,457)	(5,349)
Cash flows from financing activities:
Purchase of treasury stock		(3,417)
Proceeds from exercise of stock-based awards	2,363	912
Net cash provided by (used in) financing activities	2,363	(2,505)
Effect of exchange rate changes on cash and cash equivalents	25	24
Decrease in cash and cash equivalents	(5,780)	(7,594)
Cash and cash equivalents at the beginning of the period	18,401	18,909
Cash and cash equivalents at the end of the period	12,621	11,315
Supplemental information of cash-flow activities:
Income and withholding taxes, net of refunds	1,280	$ 311
Non-cash transactions:
Property and equipment purchases incurred but unpaid at period end	$ 29