CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 33,152	$ 56,865
Short-term investments	28,863	32,907
Accounts and other receivables (net of allowances for doubtful accounts of $6, and $0, respectively)	3,335	1,382
Prepaid expenses and other current assets	989	2,876
Total current assets	66,339	94,030
Property and equipment, net	3,638	4,016
Deferred income tax assets	437	359
Prepaid income taxes	0	4,997
Intangibles and other assets, net	363	365
Total assets	70,777	103,767
Current liabilities:
Accounts payable	10,237	5,951
Accrued compensation	2,355	4,753
Other current liabilities	3,886	4,409
Deferred revenue	5,004	5,909
Total current liabilities	21,482	21,022
Long-term deferred revenue	24,369	26,393
Other long-term liabilities	963	1,012
Total liabilities	46,814	48,427
Contingencies (Note 12)
Stockholders’ equity:
Common stock and additional paid-in capital — $0.001 par value; 100,000,000 shares authorized; 35,891,850 and 35,555,562 shares issued, respectively; 29,253,847 and 28,917,559 shares outstanding, respectively	224,451	221,098
Accumulated other comprehensive income	91	115
Accumulated deficit	(154,035)	(119,329)
Treasury stock at cost: 6,638,003 shares	(46,544)	(46,544)
Total stockholders’ equity	23,963	55,340
Total liabilities and stockholders’ equity	$ 70,777	$ 103,767