Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 24,923	$ 15,369
Short-term investments	77,959	61,496
Accounts receivable	1,555	15,000
Prepaid and other current assets	3,535	4,201
Total current assets	107,972	96,066
Long-term investments	1,171
Other assets, noncurrent	698	257
Right-of-use assets	1,524	1,927
Property and equipment, net	439	304
Total assets	111,804	98,554
Current liabilities:
Accounts payable	4,244	4,279
Accrued compensation	2,543	2,106
Deferred revenue	764	15,000
Other accrued liabilities	8,750	7,031
Operating lease liability	519	483
Total current liabilities	16,820	28,899
Operating lease liability, noncurrent	925	1,319
Total liabilities	17,745	30,218
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; 22,082,924 and 12,040,835 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	22	12
Additional paid-in capital	389,883	326,810
Accumulated other comprehensive income	8	34
Accumulated deficit	(295,854)	(258,520)
Total stockholders’ equity	94,059	68,336
Total liabilities and stockholders’ equity	$ 111,804	$ 98,554