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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net income (loss) $ (23,183) $ 396 $ (2,379)
Adjustments required to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation 3,190 3,184 3,233
Amortization of intangible assets 4,371 3,801 2,588
Impairment of assets 3,556 0 0
Equity-based compensation 14,505 13,055 13,636
Realized loss (gain), net on sale of available-for-sale marketable securities 55 (13) 6
Amortization of premiums on available-for-sale marketable securities 397 420 444
Unrealized foreign exchange (gain) loss, net (351) 1,163 (591)
Remeasurement of marketable equity securities 2,511 (1,983) (0)
Changes in operating assets and liabilities:      
Trade receivables, net (3,749) 5,842 (2,917)
Prepaid expenses and other assets (1,126) 3,604 (559)
Operating lease right-of-use assets (1,456) 225 2,014
Accrued interest on bank deposits 144 (65) 1,186
Deferred taxes, net 7,811 (6,305) (335)
Trade payables 511 404 186
Deferred revenues (5,493) 5,053 (1,208)
Accrued expenses and other payables 333 (1,737) 133
Accrued payroll and related benefits 984 (875) 1,803
Operating lease liability 1,504 (232) (2,183)
Income taxes payable 2,127 189 143
Accrued severance pay, net 283 (322) (37)
Net cash provided by operating activities 6,924 25,804 15,163
Cash flows from investing activities:      
Acquisition of a business, net of cash acquired (see note 1) 0 (29,891) 0
Purchase of property and equipment (3,499) (2,193) (2,935)
Investment in bank deposits (14,000) (1,500) (43,893)
Proceeds from bank deposits 30,885 19,989 55,393
Investment in available-for-sale marketable securities (49,873) (39,192) (56,011)
Proceeds from maturity of available-for-sale marketable securities 18,196 26,043 21,956
Proceeds from sale of available-for-sale marketable securities 3,175 10,035 10,272
Net cash used in investing activities (15,116) (16,709) (15,218)
Cash flows from financing activities:      
Purchase of treasury stock (6,785) 0 (4,780)
Payment of contingent consideration liability 0 0 (204)
Proceeds from exercise of stock-based awards 3,479 3,242 2,871
Net cash provided by (used in) financing activities (3,306) 3,242 (2,113)
Effect of exchange rate changes on cash and cash equivalents (370) (327) 508
Increase (decrease) in cash and cash equivalents (11,868) 12,010 (1,660)
Cash and cash equivalents at the beginning of the year 33,153 21,143 22,803
Cash and cash equivalents at the end of the year 21,285 33,153 21,143
Supplemental information of cash-flows activities:      
Income and withholding taxes 10,193 9,183 4,727
Non-cash transactions:      
Property and equipment purchases incurred but unpaid at the end of the year 25 59 5
Right-of-use assets obtained in the exchange for operating lease liabilities $ 5,009 $ 2,679 $ 6,787