Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 16,866	$ 33,091
Short-term marketable securities	75,823	68,760
Prepaid expenses and other current assets	2,130	3,338
Total current assets	94,819	105,189
Property and equipment, net	4,200	4,794
Operating lease right-of-use assets	3,837	4,582
Long-term marketable securities	0	21,655
Restricted cash	405	405
Other assets	866	549
Total assets	104,127	137,174
Current liabilities:
Accounts payable	418	2,718
Accrued and other liabilities	6,012	8,662
Lease liabilities, current portion	2,094	2,193
Total current liabilities	8,524	13,573
Lease liabilities, noncurrent portion	4,525	5,600
Warrant liabilities	1,382	8,301
Total liabilities	14,431	27,474
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 10,000 shares authorized; no shares issued and outstanding as of June 30, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value, 500,000 shares authorized as of June 30, 2022 and December 31, 2021; 35,124 and 35,034 shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	4	4
Additional paid-in-capital	254,689	252,464
Accumulated other comprehensive loss	(476)	(119)
Accumulated deficit	(164,521)	(142,649)
Total stockholders' equity	89,696	109,700
Total liabilities and stockholders’ equity	$ 104,127	$ 137,174