CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 18,468	$ 40,014
Short-term investments	102,185	75,870
Accounts receivable	2,060	3,224
Prepaid expenses and other current assets	3,426	3,267
Total current assets	126,139	122,375
Long-term investments	0	23,964
Property and equipment, net	479	505
Restricted cash, long-term	726	726
Operating lease right-of-use asset	4,413	5,749
Goodwill	8,982	8,982
Total assets	140,739	162,301
Current liabilities:
Accounts payable	4,281	6,417
Accrued liabilities	4,586	6,339
Current portion of operating lease liability	824	682
Total current liabilities	9,691	13,438
Long-term operating lease liability	2,941	4,358
Liability related to the sale of future royalties, net	52,133	53,798
Total liabilities	64,765	71,594
Stockholders’ equity:
Common stock, $0.01 par value—227,812,500 shares authorized; 91,645,369 shares issued and outstanding at March 31, 2022; 227,812,500 shares authorized; 91,645,369 shares issued and outstanding at December 31, 2021	916	916
Additional paid-in capital	1,183,943	1,182,225
Accumulated deficit	(1,108,434)	(1,092,325)
Accumulated other comprehensive loss	(451)	(109)
Total stockholders’ equity	75,974	90,707
Total liabilities and stockholders’ equity	$ 140,739	$ 162,301