Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 37,470	$ 15,142
Marketable securities	51,080	77,986
License and development receivables	479	815
Prepaid expenses and other current assets	7,617	4,948
Total current assets	96,646	98,891
Restricted cash	1,804	1,838
Property and equipment, net	3,890	4,549
Operating lease right-of-use assets	3,615	3,806
Other non-current assets	752	842
TOTAL ASSETS	106,707	109,926
CURRENT LIABILITIES
Accounts payable	1,958	3,319
Operating lease liabilities	477	436
Deferred revenue	291	2,359
Accrued and other current liabilities	13,136	14,030
Total current liabilities	15,862	20,144
Non-current operating lease liabilities	4,316	4,608
Deferred revenue, net of current portion	2,372	1,217
Other non-current liabilities	0	16
TOTAL LIABILITIES	22,550	25,985
Commitments and Contingencies (Note 7)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of June 30, 2022 and December 31, 2021; no shares issued and outstanding as of June 30, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value; 500,000,000 shares authorized as of June 30, 2022 and December 31, 2021; 61,172,510 shares and 49,355,130 shares issued and outstanding as of June 30,2022 and December 31, 2021, respectively	6	5
Additional paid-in capital	472,939	425,765
Accumulated other comprehensive loss	(220)	(20)
Accumulated deficit	(388,568)	(341,809)
TOTAL STOCKHOLDERS’ EQUITY	84,157	83,941
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 106,707	$ 109,926