Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 274,015	$ 104,749
Prepaid expenses and other current assets	4,182	2,644
Total current assets	278,197	107,393
Property and equipment, net	129	141
Operating lease right-of-use assets	708	788
Other assets	966	1,045
TOTAL ASSETS	280,000	109,367
CURRENT LIABILITIES:
Accrued and other liabilities	11,282	10,726
Accounts payable	1,798	2,158
Total current liabilities	13,080	12,884
Term loan	4,862
Operating lease liabilities	436	485
TOTAL LIABILITIES	18,378	13,369
Commitments and Contingencies (Note 8)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.001 par value; 10,000,000 shares authorized as of March 31, 2022 and December 31, 2021; nil shares issued and outstanding as of March 31, 2022 and December 31, 2021
Common stock, $0.001 par value; 500,000,000 shares authorized as of March 31, 2022 and December 31, 2021; 23,800,409 and 15,571,656 shares issued and outstanding as of March 31, 2022 and December 31, 2021	24	16
Additional paid-in capital	1,230,774	1,037,230
Accumulated deficit	(969,176)	(941,248)
TOTAL STOCKHOLDERS’ EQUITY	261,622	95,998
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 280,000	$ 109,367