CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 45,401	$ 112,584
Marketable securities	0	33,818
Other receivables	1,559	2,280
Tax incentive receivable, current	19	361
Prepaid expenses and other current assets	4,975	8,829
Total current assets	51,954	157,872
Property and equipment, net	623	1,026
Operating lease right of use assets	5,584	6,530
Other assets	5,467	5,644
Total assets	63,628	171,072
Current liabilities:
Accounts payable	1,711	1,101
Accrued expenses and other current liabilities	8,511	14,350
Operating lease liabilities	1,528	1,362
Deferred Revenue, Current	2,364	1,857
Derivative liability, current	115	0
Total current liabilities	14,229	18,670
Non-current operating lease liabilities	5,473	5,973
Liability related to the sale of future royalties, non-current	0	48,414
Deferred revenue, non-current	7,886	8,786
Derivative Liability, Noncurrent	0	802
Other long-term liabilities	117	138
Total liabilities	27,705	82,783
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, 2,275,214 shares issued and outstanding as of June 30, 2022 and 3,218,152 shares issued and outstanding as of December 31, 2021	2	3
Common stock, $0.001 par value; 120,000,000 shares authorized as of June 30, 2022 and December 31, 2021; 35,067,477 shares issued and outstanding as of June 30, 2022 and 32,393,738 shares issued and outstanding as of December 31, 2021	35	32
Additional paid-in capital	464,860	455,719
Accumulated deficit	(428,974)	(367,463)
Accumulated other comprehensive gain (loss)	(0)	(2)
Total stockholders' equity	35,923	88,289
Total liabilities and stockholders' equity	$ 63,628	$ 171,072