CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 86,478	$ 110,988
Short-term investments	3,019	13,930
Accounts and other receivables	3,385	1,051
Prepaid expenses and other current assets	14,078	9,856
Total current assets	106,960	135,825
Property and equipment, net	1,226	2,343
Other assets, net	16,662	7,827
Total assets	124,848	145,995
Current liabilities:
Accounts payable	809	3,612
Accrued compensation	2,844	3,948
Other current liabilities	3,478	3,194
Deferred revenue	4,692	4,591
Total current liabilities	11,823	15,345
Long-term deferred revenue	25,952	30,203
Other long-term liabilities	3,316	787
Total liabilities	41,091	46,335
Commitments and contingencies (Note12)
Stockholders’ equity:
Common stock and additional paid-in capital – $0.001 par value; 100,000,000 shares authorized; 38,624,784 and 37,652,498 shares issued, respectively; 31,414,328 and 30,829,351 shares outstanding, respectively	253,289	246,415
Accumulated other comprehensive income	124	116
Accumulated deficit	(118,565)	(98,521)
Treasury stock at cost: 7,210,456 and 6,823,147 shares, respectively	(51,091)	(48,350)
Total stockholders’ equity	83,757	99,660
Total liabilities and stockholders’ equity	$ 124,848	$ 145,995