Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 141,075	$ 16,123
Short-term investments	0	24,397
Restricted cash, current	0	132
Prepaid expenses and other current assets	1,475	1,650
Total current assets	142,550	42,302
Restricted cash, noncurrent	254	254
Property and equipment, net	1,695	1,552
Operating lease, right-of-use asset	9,534	9,985
Total assets	154,033	54,093
Current liabilities:
Accounts payable	742	1,543
Accrued liabilities	5,065	5,285
Deferred revenue, current	28,505	1,435
Operating lease liability, current	219	0
Current portion of long-term debt	1,318	418
Total current liabilities	35,849	8,681
Deferred revenue, noncurrent	29,988	0
Operating lease liability, noncurrent	11,987	11,429
Long-term debt	8,741	4,509
Total liabilities	86,565	24,619
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value per share; 200,000,000 shares authorized at September 30, 2020 and December 31, 2019; 23,853,650 shares issued and 23,803,183 shares outstanding at September 30, 2020; 18,638,359 shares issued and 18,587,892 shares outstanding at December 31, 2019	24	19
Treasury stock, at cost; 50,467 shares at September 30, 2020 and December 31, 2019	0	0
Additional paid-in capital	177,009	117,371
Accumulated other comprehensive gain (loss)	(41)	10
Accumulated deficit	(109,524)	(87,926)
Total stockholders’ equity	67,468	29,474
Total liabilities and stockholders’ equity	$ 154,033	$ 54,093