INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 17,103	$ 18,401
Short term bank deposits	29,688	46,247
Marketable securities	73,209	61,868
Trade receivables	10,389	15,044
Prepaid expenses and other current assets	4,819	3,152
Total current assets	135,208	144,712
Long term bank deposits	50,196	29,977
Severance pay fund	8,956	7,941
Deferred tax assets	2,701	2,252
Property and equipment, net	6,157	4,805
Goodwill	46,612	46,612
Intangible assets, net	2,360	2,978
Other long-term assets	4,093	3,218
Total long-term assets	121,075	97,783
Total assets	256,283	242,495
Current liabilities:
Trade payables	290	571
Deferred revenues	3,388	6,258
Accrued expenses and other payables	3,006	4,015
Accrued payroll and related benefits	10,496	11,751
Total current liabilities	17,180	22,595
Long term liabilities:
Accrued severance pay	9,450	8,349
Total long-term liabilities	9,450	8,349
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 June 30, 2017 (unaudited) and December 31, 2016. 21,887,434 and 21,273,500 shares outstanding at June 30, 2017 (unaudited) and December 31, 2016, respectively	22	21
Additional paid in-capital	213,504	212,103
Treasury stock at cost (1,707,726 and 2,321,660 shares of common stock at June 30, 2017 (unaudited) and December 31, 2016, respectively)	(29,060)	(39,507)
Accumulated other comprehensive loss	(278)	(497)
Retained earnings	45,465	39,431
Total stockholders' equity	229,653	211,551
Total liabilities and stockholders' equity	$ 256,283	$ 242,495