Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 23,090	$ 44,347
Short-term investments		2,504
Accounts and other receivables	5,000	1,818
Prepaid and other current assets	2,156	2,807
Total current assets	30,246	51,476
Other assets, noncurrent	168	472
Right-of-use assets	481	2,744
Property and equipment, net	124	970
Total assets	31,019	55,662
Current liabilities:
Accounts payable	41	6,419
Accrued compensation	1,040	1,467
Deferred revenue		230
Other accrued liabilities	182	4,072
Operating lease liability	381	1,977
Total current liabilities	1,644	14,165
Operating lease liability, noncurrent		408
Total liabilities	1,644	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; 31,490,053 and 31,409,707 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively	31	31
Additional paid-in capital	399,826	443,752
Accumulated deficit	(370,482)	(402,694)
Total stockholders’ equity	29,375	41,089
Total liabilities and stockholders’ equity	$ 31,019	$ 55,662