Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 22,803	$ 22,260
Short-term bank deposits	56,915	46,139
Marketable securities (Note 3)	64,867	77,469
Trade receivables (net of allowance for doubtful accounts of $0 and $327 at December 31, 2018 and December 31, 2019, respectively)	28,307	26,156
Prepaid expenses and other current assets	5,660	5,264
Total current assets	178,552	177,288
Long-term assets:
Bank deposits	5,368	21,864
Severance pay fund	9,881	9,026
Deferred tax assets, net (Note 14)	10,605	5,924
Property and equipment, net (Note 6)	7,879	7,344
Operating lease right-of-use assets	11,066
Goodwill	51,070	46,612
Intangible assets, net (Note 7)	13,424	2,700
Investments in other company	936	936
Other long-term assets	8,240	5,569
Total long-term assets	118,469	99,975
Total assets	297,021	277,263
Current liabilities:
Trade payables	701	632
Deferred revenues	3,642	3,593
Accrued expenses and other payables (Note 8)	3,748	4,344
Accrued payroll and related benefits	15,894	13,183
Operating lease liabilities	2,393
Total current liabilities	26,378	21,752
Long-term liabilities:
Accrued severance pay	10,551	9,632
Operating lease liabilities	8,273
Other accrued liabilities	662
Total long-term liabilities	19,486	9,632
Stockholders’ equity (Note 9):
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, 2018 and 2019; 21,787,860 and 21,839,369 shares outstanding at December 31, 2018 and 2019, respectively	22	22
Additional paid in-capital	228,005	223,250
Treasury stock at cost (1,807,300 and 1,755,791 shares of common stock at December 31, 2018 and 2019, respectively)	(39,390)	(39,132)
Accumulated other comprehensive gain (loss) (Note 11)	94	(1,114)
Retained earnings	62,426	62,853
Total stockholders’ equity	251,157	245,879
Total liabilities and stockholders’ equity	$ 297,021	$ 277,263