Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 15,142	$ 90,095
Marketable securities	77,986	56,178
License and development receivable	815	0
Prepaid expenses and other current assets	4,948	3,516
Total current assets	98,891	149,789
Restricted cash	1,838	1,842
Property and equipment, net	4,549	5,642
Operating lease right-of-use assets	3,806	4,230
Other non-current assets	842	115
TOTAL ASSETS	109,926	161,618
CURRENT LIABILITIES
Accounts payable	3,319	2,254
Operating lease liabilities	436	319
Deferred revenue	2,359	0
Accrued and other current liabilities	14,030	13,870
Total current liabilities	20,144	16,443
Non-current operating lease liabilities	4,608	5,129
Deferred revenue, net of current portion	1,217	0
Other non-current liabilities	16	214
TOTAL LIABILITIES	25,985	21,786
Commitments and Contingencies (Note 9)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as ofDecember 31, 2020 and 2019; no shares issued and outstanding as ofDecember 31, 2020 and 2019
Common stock, $0.0001 par value; 500,000,000 shares authorized as of December 31, 2021 and 2020, 49,355,130 shares and 47,959,086 shares issued and outstanding as of December 31, 2021 and 2020, respectively	5	5
Additional paid-in capital	425,765	415,824
Accumulated other comprehensive (loss) income	(20)	11
Accumulated deficit	(341,809)	(276,008)
TOTAL STOCKHOLDERS’ EQUITY	83,941	139,832
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 109,926	$ 161,618