Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 70,364	$ 15,369
Short-term investments	34,164	61,496
Accounts receivable	1,366	15,000
Prepaid and other current assets	2,381	4,201
Total current assets	108,275	96,066
Other assets, noncurrent	197	257
Right-of-use assets	1,795	1,927
Property and equipment, net	296	304
Total assets	110,563	98,554
Current liabilities:
Accounts payable	1,316	4,279
Accrued compensation	1,268	2,106
Deferred revenue		15,000
Other accrued liabilities	8,774	7,031
Operating lease liability	495	483
Total current liabilities	11,853	28,899
Operating lease liability, noncurrent	1,191	1,319
Total liabilities	13,044	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; 17,419,313 and 12,040,835 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	17	12
Additional paid-in capital	359,935	326,810
Accumulated other comprehensive income	140	34
Accumulated deficit	(262,573)	(258,520)
Total stockholders’ equity	97,519	68,336
Total liabilities and stockholders’ equity	$ 110,563	$ 98,554