Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 160,698	$ 139,886
Marketable securities	59,566	119,390
Prepaid expenses and other current assets	4,751	4,435
Restricted cash	1,255	1,255
Total current assets	226,270	264,966
Operating lease, right-of-use asset	23,122	23,316
Property and equipment, net	9,031	7,783
Other assets	4,775	4,745
Total assets	263,198	300,810
Current liabilities:
Accounts payable	4,172	5,842
Accrued expenses and other current liabilities	16,001	17,884
CVR liability (Note 3)		1,700
Operating lease liability	947	1,423
Total current liabilities	21,120	26,849
Operating lease liability, net of current portion	18,515	18,226
Total liabilities	39,635	45,075
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock, $0.001 par value; 150,000,000 shares authorized; 70,946,790 shares and 69,893,434 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	71	70
Additional paid-in capital	610,967	601,153
Accumulated other comprehensive income (loss)	16	(104)
Accumulated deficit	(449,801)	(411,214)
Total stockholders’ equity	223,563	255,735
Total liabilities and stockholders’ equity	263,198	300,810
Series A Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value	$ 62,310	$ 65,830