CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 20,879	$ 25,013
Short-term investments	39,927	39,918
Accounts and other receivables (net of allowances for doubtful accounts of $15)	4,774	1,213
Prepaid expenses and other current assets	2,679	2,790
Total current assets	68,259	68,934
Property and equipment, net	4,412	4,589
Deferred income tax assets	26,262	24,633
Prepaid income taxes	6,270	6,995
Intangibles and other assets, net	245	264
Total assets	105,448	105,415
Current liabilities:
Accounts payable	2,978	650
Accrued compensation	2,769	4,840
Other current liabilities	2,782	2,999
Deferred revenue	6,943	6,696
Total current liabilities	15,472	15,185
Long-term deferred revenue	1,121	2,516
Other long-term liabilities	837	1,099
Total liabilities	$ 17,430	$ 18,800
Contingencies
Stockholders’ equity:
Common stock and additional paid-in capital — $0.001 par value; 100,000,000 shares authorized; 35,334,795 and 34,845,310 shares issued, respectively; 28,818,901 and 28,329,416 shares outstanding, respectively	$ 216,181	$ 212,115
Accumulated other comprehensive income	118	86
Accumulated deficit	(82,643)	(79,948)
Treasury stock at cost: 6,515,894 shares	(45,638)	(45,638)
Total stockholders’ equity	88,018	86,615
Total liabilities and stockholders’ equity	$ 105,448	$ 105,415