Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 88,220	$ 16,123
Short-term investments	1,998	24,397
Restricted cash, current	0	132
Prepaid expenses and other current assets	1,018	1,650
Total current assets	91,236	42,302
Restricted cash, noncurrent	254	254
Property and equipment, net	1,531	1,552
Operating lease, right-of-use asset	9,674	9,985
Total assets	102,695	54,093
Current liabilities:
Accounts payable	548	1,543
Accrued liabilities	3,824	5,285
Deferred revenue, current	23,688	1,435
Current portion of long-term debt	119	418
Total current liabilities	28,179	8,681
Deferred revenue, noncurrent	36,468	0
Operating lease liability, noncurrent	11,947	11,429
Long-term debt	9,873	4,509
Total liabilities	86,467	24,619
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value per share; 200,000,000 shares authorized at June 30, 2020 and December 31, 2019; 18,641,698 shares issued and 18,591,231 shares outstanding at June 30, 2020; 18,638,359 shares issued and 18,587,892 shares outstanding at December 31, 2019	19	19
Treasury stock, at cost; 50,467 shares at June 30, 2020 and December 31, 2019	0	0
Additional paid-in capital	119,651	117,371
Accumulated other comprehensive gain (loss)	(55)	10
Accumulated deficit	(103,387)	(87,926)
Total stockholders’ equity	16,228	29,474
Total liabilities and stockholders’ equity	$ 102,695	$ 54,093