CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 92,614	$ 110,988
Short-term investments	8,997	13,930
Accounts and other receivables	4,967	1,051
Prepaid expenses and other current assets	8,240	9,856
Total current assets	114,818	135,825
Property and equipment, net	1,947	2,343
Other assets, net	18,271	7,827
Total assets	135,036	145,995
Current liabilities:
Accounts payable	7,371	3,612
Accrued compensation	1,945	3,948
Other current liabilities	5,968	3,194
Deferred revenue	4,742	4,591
Total current liabilities	20,026	15,345
Long-term deferred revenue	27,945	30,203
Other long-term liabilities	3,355	787
Total liabilities	51,326	46,335
Contingencies (Note 12)
Stockholders’ equity:
Common stock and additional paid-in capital — $0.001 par value; 100,000,000 shares authorized; 38,488,327 and 37,652,498 shares issued, respectively; 31,665,180 and 30,829,351 shares outstanding, respectively	250,079	246,415
Accumulated other comprehensive income	138	116
Accumulated deficit	(118,157)	(98,521)
Treasury stock at cost: 6,823,147 and 6,823,147 shares, respectively	(48,350)	(48,350)
Total stockholders’ equity	83,710	99,660
Total liabilities and stockholders’ equity	$ 135,036	$ 145,995