CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 24,117	$ 18,422
Short-term bank deposits	41,947	47,229
Marketable securities (Note 2)	68,464	69,343
Trade receivables (net of allowance for doubtful accounts of $9 and $0)	5,629	6,232
Deferred tax assets (Note 12)	3,457	2,065
Prepaid expenses and other current assets (Note 5)	1,996	2,361
Total current assets	145,610	145,652
Long-term assets:
Long term bank deposits	17,066	23,050
Severance pay fund	7,215	6,130
Deferred tax assets (Note 12)	955	1,178
Property and equipment, net (Note 4)	1,616	1,392
Goodwill	36,498	36,498
Investments in other companies	3,367	2,433
Total long-term assets	66,717	70,681
Total assets	212,327	216,333
Current liabilities:
Trade payables	1,085	1,176
Deferred revenues	623	865
Accrued expenses and other payables (Note 6)	2,955	3,462
Accrued payroll and related benefits	7,681	6,978
Income taxes payable, net	1,833	1,626
Total current liabilities	14,177	14,107
Long-term liabilities:
Accrued severance pay	7,255	6,158
Total long-term liabilities	7,255	6,158
Stockholders' equity:
Preferred stock: $0.001 par value: 5,000,000 shares authorized; none issued and outstanding
Common stock: $0.001 par value: 60,000,000 shares authorized; 23,595,160 shares issued at December 31, 2012 and 2013. 22,187,367 and 21,181,730 shares outstanding at December 31, 2012 and 2013, respectively	21	22
Additional paid in-capital	204,415	198,495
Treasury stock at cost (1,407,793 and 2,413,430 shares of common stock at December 31, 2012 and 2013, respectively)	(41,005)	(25,694)
Accumulated other comprehensive income (loss)	(81)	360
Retained earnings	27,545	22,885
Total stockholders' equity	190,895	196,068
Total liabilities and stockholders' equity	$ 212,327	$ 216,333