Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 97,605	$ 96,089
Accounts receivable, net of allowances of $213 in 2019 and $332 in 2018	40,651	51,570
Prepaid expenses and other current assets	9,320	9,562
Total current assets	147,576	157,221
Property and equipment, net	40,798	35,681
Operating lease right-of-use assets, net	7,609
Goodwill	2,293	1,923
Intangible assets, net	6,221	5,064
Deferred tax assets	25,327	19,044
Other non-current assets	9,720	6,972
Total assets	239,544	225,905
Current liabilities:
Accounts payable	7,636	2,454
Accrued compensation and related benefits	5,072	4,727
Accrued and other current liabilities	1,665	3,235
Operating lease liabilities – current portion	1,867
Deferred revenues – current portion	10,639	8,477
Billings in excess of recognized revenues	1,117	635
Total current liabilities	27,996	19,528
Long-term income taxes payable	5,368	3,751
Non-current operating lease liabilities	7,677
Other non-current liabilities	2,346	2,831
Total liabilities	43,387	26,110
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.00015 par value, 70,000 shares authorized; shares issued 41,797 and 40,677, respectively; shares outstanding 32,503 and 32,382, respectively	5	5
Additional paid-in capital	325,197	310,660
Treasury stock, at cost, 9,294 and 8,295 shares, respectively	(91,695)	(79,142)
Accumulated deficit	(35,870)	(30,452)
Accumulated other comprehensive loss	(1,480)	(1,276)
Total stockholders’ equity	196,157	199,795
Total liabilities and stockholders’ equity	$ 239,544	$ 225,905