CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 8,109	$ 17,795
Marketable securities	87,396	89,321
Prepaid expenses	2,649	1,129
Other current assets	454	344
Total current assets	98,608	108,589
Right of use assets - operating leases, net	5,297	5,355
Right of use assets - financing leases, net	2,133	2,319
Property and equipment, net	1,814	2,049
Other non-current assets	81	63
Total assets	107,933	118,375
Current liabilities:
Accounts payable and accrued liabilities	4,715	4,473
Compensation and employee benefits liabilities	583	2,462
Operating lease liabilities, current	1,406	1,251
Financing lease liabilities, current	879	880
Total current liabilities	7,583	9,066
Operating lease liabilities, non-current	4,119	4,323
Financing lease liabilities, non-current	1,347	1,579
Other non-current liabilities	34	0
Total liabilities	13,083	14,968
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.0001 par value and 10,000,000 shares authorized as of March 31, 2023 and December 31, 2022; zero shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively
Common stock, $0.0001 par value and 250,000,000 shares authorized as of March 31, 2023 and December 31, 2022; 30,971,341 and 30,764,160 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	3	3
Additional paid-in capital	303,641	302,202
Accumulated deficit	(207,971)	(197,794)
Accumulated other comprehensive loss	(823)	(1,004)
Total stockholders' equity	94,850	103,407
Total liabilities and stockholders' equity	$ 107,933	$ 118,375