CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 6,685	$ 13,685	$ 18,562
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation	670	525	506
Equity-based compensation	5,920	5,083	5,158
Gain from sale of property and equipment			(10)
Realized gain, net on sale of available-for-sale marketable securities	(379)	(184)	(54)
Amortization of premiums on available-for-sale marketable securities	1,504	1,267	2,068
Unrealized foreign exchange gain	(49)	(21)	(46)
Accrued interest on bank deposits	(245)	(1,842)	(1,070)
Changes in operating assets and liabilities:
Decrease (increase) in trade receivables	603	(1,116)	790
Decrease in prepaid expenses and other current assets	146	856	3,338
Increase in deferred tax, net	(1,191)	(656)	(1,443)
Increase (decrease) in trade payables	(102)	594	7
Increase (decrease) in deferred revenues	(242)	(209)	458
Increase (decrease) in accrued expenses and other payables	(394)	282	(589)
Increase in accrued payroll and related benefits	568	57	137
Increase in income taxes payable	207	1,081	475
Excess tax benefit from equity-based compensation		(672)	(1,290)
Increase (decrease) in accrued severance pay, net	6	(106)	85
Net cash provided by operating activities	13,707	18,624	27,082
Cash flows from investing activities:
Purchase of property and equipment	(894)	(682)	(393)
Proceeds from sale of property and equipment			10
Investment in bank deposits	(40,190)	(64,695)	(64,709)
Proceeds from bank deposits	51,850	76,921	25,040
Investment in available-for-sale marketable securities	(64,760)	(60,863)	(42,291)
Proceeds from maturity of available-for-sale marketable securities	8,686	14,983	29,173
Proceeds from sale of available-for-sale marketable securities	55,514	45,704	14,813
Investments in other companies	(934)	(1,533)	(900)
Net cash provided by (used in) investing activities	9,272	9,835	(39,257)
Cash flows from financing activities:
Purchase of Treasury Stock	(19,816)	(27,168)
Proceeds from exercise of stock-based awards	2,479	1,615	8,660
Excess tax benefit from equity-based compensation	0	672	1,290
Net cash provided by (used in) financing activities	(17,337)	(24,881)	9,950
Effect of exchange rate movements on cash	53	(110)	81
Increase (decrease) in cash and cash equivalents	5,695	3,468	(2,144)
Cash and cash equivalents at the beginning of the year	18,422	14,954	17,098
Cash and cash equivalents at the end of the year	24,117	18,422	14,954
Cash paid during the year for:
Income and withholding taxes, net of refunds	$ 1,851	$ 926	$ 528