Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 91,420	$ 64,330
Marketable securities	231,879	296,112
Prepaid expenses and other current assets	5,531	6,686
Total current assets	328,830	367,128
Property and equipment, net	11,132	7,224
Restricted cash	5,237	5,237
Operating lease right-of-use assets	1,340	1,839
Other long term assets	2,702	2,696
Total assets	349,241	384,124
Current liabilities:
Accounts payable	2,438	7,077
Accrued expenses	10,933	12,992
Operating lease obligations, current portion	1,432	1,955
Total current liabilities	14,803	22,024
Success Payment Liability	2,694	4,371
Other long term liabilities	354	377
Total liabilities	17,851	26,772
Commitments and contingencies (See Note 7 and Note 8)
Stockholders' equity (deficit):
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	0	0
Common stock, $0.001 par value; 200,000,000 and 255,000,000 shares authorized, 48,655,241 and 48,511,735 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	49	49
Additional paid-in capital	549,089	544,381
Accumulated other comprehensive income	(732)	(228)
Accumulated deficit	(217,016)	(186,850)
Total stockholders equity	331,390	357,352
Total liabilities, convertible preferred stock, and stockholders' equity (deficit)	$ 349,241	$ 384,124