Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 35,494	$ 37,887
Short-term investments	47,942	58,497
Other current assets	2,200	2,750
Total current assets	85,636	99,134
Property and equipment, net	2,489	6,163
Operating lease right-of-use assets	9,430	9,715
Other non-current assets	905	936
Total assets	98,460	115,948
Current liabilities
Accounts payable and accrued liabilities	5,421	9,547
Operating lease liabilities	1,431	1,375
Finance lease liabilities	304	140
Total current liabilities	7,156	11,062
Non-current operating lease liabilities	9,940	10,322
Non-current finance lease liabilities	7	233
Total liabilities	17,103	21,617
Stockholders’ equity
Common stock - $0.000001 par value - authorized, 100,000,000 as of March 31, 2023 and December 31, 2022; issued and outstanding, 42,818,346 as of March 31, 2023 and 42,648,346 as of December 31, 2022	0	0
Preferred stock - $0.000001 par value - authorized, 5,000,000 as of March 31, 2023 and December 31, 2022; issued and outstanding, 0 as of March 31, 2023 and December 31, 2022	0	0
Additional paid-in capital	546,598	545,407
Accumulated other comprehensive income (loss)	18	(21)
Accumulated deficit	(465,259)	(451,055)
Total stockholders’ equity	81,357	94,331
Total liabilities and stockholders’ equity	$ 98,460	$ 115,948