Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 219,684	$ 242,190
Prepaid expenses and other current assets	2,949	2,722
Total current assets	222,633	244,912
Operating lease, right-of-use asset	2,771	4,615
Property and equipment, net	1,706	134
Restricted cash	1,255	1,255
Other assets	3,727
Total assets	232,092	250,916
Current liabilities:
Accounts payable	3,483	732
Accrued expenses and other current liabilities	8,210	4,779
CVR liability (Note 3)	3,060	5,531
Operating lease liability	2,324	2,052
Total current liabilities	17,077	13,094
Operating lease liability, net of current portion	831	3,155
Total liabilities	17,908	16,249
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, value
Common stock, $0.001 par value; 150,000,000 shares authorized; 43,805,922 shares and 32,347,905 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	44	32
Additional paid-in capital	399,713	322,454
Accumulated deficit	(270,973)	(198,700)
Total stockholders’ equity	214,184	234,667
Total liabilities and stockholders’ equity	232,092	250,916
Series A Convertible Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, value	$ 85,400	$ 110,881