INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 28,201	$ 24,117
Short term bank deposits	42,137	41,947
Marketable securities	65,338	68,464
Trade receivables	3,066	5,629
Deferred tax assets	3,278	3,457
Prepaid expenses and other current assets	3,641	1,996
Total current assets	145,661	145,610
Long term bank deposits	17,138	17,066
Severance pay fund	7,273	7,215
Deferred tax assets	1,036	955
Property and equipment, net	1,531	1,616
Goodwill	36,498	36,498
Investments in other companies	3,367	3,367
Total long-term assets	66,843	66,717
Total assets	212,504	212,327
Current liabilities:
Trade payables	622	1,085
Deferred revenues	800	623
Accrued expenses and other payables	2,646	2,955
Accrued payroll and related benefits	7,810	7,681
Income taxes payable, net	1,858	1,833
Total current liabilities	13,736	14,177
Long term liabilities:
Accrued severance pay	7,383	7,255
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 March 31, 2014 and December 31, 2013. 21,031,689 and 21,181,730 shares outstanding at March 31, 2014 and December 31, 2013, respectively	21	21
Additional paid in-capital	206,107	204,415
Treasury stock at cost (2,563,471 and 2,413,430 shares of common stock at March 31, 2014 and December 31, 2013, respectively)	(43,678)	(41,005)
Accumulated other comprehensive loss	(56)	(81)
Retained earnings	28,991	27,545
Total stockholders' equity	191,385	190,895
Total liabilities and stockholders' equity	$ 212,504	$ 212,327