Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 73,621	$ 30,360
Short-term investments	12,902	48,994
Accounts receivable	1,971	3,313
Prepaid and other current assets	8,332	6,843
Total current assets	96,826	89,510
Long-term investments		2,543
Other assets, noncurrent	1,169	528
Right-of-use assets	3,107	1,832
Property and equipment, net	684	433
Total assets	101,786	94,846
Current liabilities:
Accounts payable	1,834	5,931
Accrued compensation	2,516	2,476
Deferred revenue	2,038	1,983
Other accrued liabilities	7,366	6,743
Operating lease liability	1,814	663
Total current liabilities	15,568	17,796
Operating lease liability, noncurrent	1,054	981
Total liabilities	16,622	18,777
Commitments and contingencies (Note 10)
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; 31,349,740 and 22,097,820 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	31	22
Additional paid-in capital	442,258	390,803
Accumulated other comprehensive income	2	5
Accumulated deficit	(357,127)	(314,761)
Total stockholders’ equity	85,164	76,069
Total liabilities and stockholders’ equity	$ 101,786	$ 94,846