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INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net income $ 4,511 $ 654
Adjustments required to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation 611 515
Amortization of intangible assets 618 649
Equity-based compensation 3,083 1,676
Realized loss, net on sale of available-for-sale marketable securities 16 46
Amortization of premiums on available-for-sale marketable securities 489 558
Unrealized foreign exchange (gain) loss (33) 233
Changes in operating assets and liabilities:    
Trade receivables (6,697) (1,043)
Prepaid expenses and other assets (1,916) (1,225)
Accrued interest on bank deposits (441) 203
Deferred tax, net (326) (456)
Trade payables 325 54
Deferred revenues (650) 1,122
Accrued expenses and other payables (51) (392)
Accretion of contingent consideration   97
Accrued payroll and related benefits (1,056) (218)
Income taxes payable 15 (342)
Accrued severance pay, net 207 179
Net cash provided by (used in) operating activities (1,295) 2,310
Cash flows from investing activities:    
Purchase of property and equipment (740) (746)
Investment in bank deposits (9,100) (45,563)
Proceeds from bank deposits 15,113 47,451
Investment in available-for-sale marketable securities (23,270) (22,695)
Proceeds from maturity of available-for-sale marketable securities 6,561 1,344
Proceeds from sale of available-for-sale marketable securities 12,549 18,364
Net cash provided by (used in) investing activities 1,113 (1,845)
Cash flows from financing activities:    
Payment of contingent consideration (see note 3)   (3,700)
Purchase of treasury stock (3,417) (5,343)
Proceeds from exercise of stock-based awards 3,392 4,534
Net cash used in financing activities (25) (4,509)
Effect of exchange rate changes on cash and cash equivalents (38) (38)
Decrease in cash and cash equivalents (245) (4,082)
Cash and cash equivalents at the beginning of the period 18,909 16,166
Cash and cash equivalents at the end of the period 18,664 12,084
Cash paid during the period for:    
Income and withholding taxes, net of refunds 1,243 $ 974
Property and equipment purchases incurred but unpaid at period end $ 245