CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 109,107	$ 112,584
Marketable securities	0	33,818
Other receivables	1,084	2,641
Prepaid expenses and other current assets	3,379	8,829
Total current assets	113,570	157,872
Property and equipment, net	368	1,026
Operating lease right-of-use assets	5,124	6,530
Other assets	5,740	5,644
Total assets	124,802	171,072
Current liabilities:
Accounts payable	617	1,101
Accrued expenses and other current liabilities	8,973	14,350
Operating lease liabilities	1,690	1,362
Deferred Revenue, Current	10,369	1,857
Total current liabilities	21,649	18,670
Liability related to the sale of future royalties	0	48,414
Non-current operating lease liabilities	4,957	5,973
Deferred revenue, non-current	22,166	8,786
Derivative liability	0	802
Other long-term liabilities	96	138
Total liabilities	48,868	82,783
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, no shares issued and outstanding as of December 31, 2022 and 3,218,152 shares issued and outstanding as of December 31, 2021	0	3
Common stock, $0.001 par value; 120,000,000 shares authorized as of December 31, 2022 and December 31, 2021; 52,456,195 shares issued and outstanding as of December 31, 2022 and 32,393,738 shares issued and outstanding as of December 31, 2021	52	32
Additional paid-in capital	489,760	455,719
Accumulated deficit	(413,878)	(367,463)
Accumulated other comprehensive gain (loss)	0	(2)
Total stockholders' equity	75,934	88,289
Total liabilities and stockholders' equity	$ 124,802	$ 171,072