Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 75,394	$ 44,347
Short-term investments		2,504
Accounts and other receivables, net	5,000	1,818
Prepaid and other current assets	914	2,807
Total current assets	81,308	51,476
Other assets, noncurrent	168	472
Right-of-use assets	1,733	2,744
Property and equipment, net	164	970
Total assets	83,373	55,662
Current liabilities:
Accounts payable	1,037	6,419
Accrued compensation	911	1,467
Deferred revenue		230
Other accrued liabilities	948	4,072
Operating lease liability	1,415	1,977
Total current liabilities	4,311	14,165
Operating lease liability, noncurrent		408
Total liabilities	4,311	14,573
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized; zero shares issued and outstanding
Common stock, $0.001 par value, 100,000,000 shares authorized; 31,477,053 and 31,409,707 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	31	31
Additional paid-in capital	444,629	443,752
Accumulated deficit	(365,598)	(402,694)
Total stockholders’ equity	79,062	41,089
Total liabilities and stockholders’ equity	$ 83,373	$ 55,662