CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 28,907	$ 34,091
Marketable securities	293,191	300,514
Restricted cash	1,706	1,706
Prepaid expenses and other current assets	2,860	3,684
Total current assets	326,664	339,995
Property and equipment, net	12,784	12,090
Other assets	4,024	4,083
Total assets	343,472	356,168
Current liabilities:
Accounts payable	2,263	1,861
Accrued liabilities	4,059	4,871
Deferred rent, current portion	163	215
Term loan, current portion	1,667	1,667
Deferred revenue, current portion		6,428
Total current liabilities	8,152	15,042
Deferred rent, net of current portion	507	359
Term loan, net of current portion	3,056	3,333
Deferred revenue, net of current portion		15,950
Total liabilities	11,715	34,684
Stockholders’ equity
Preferred stock; par value of $0.001 per share, 10,000,000 shares authorized at March 31, 2020 and December 31, 2019, respectively. No shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively
Common stock, par value of $0.001 per share; 100,000,000 shares authorized at March 31, 2020 and December 31, 2019, respectively. 27,516,402 and 27,499,260 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	28	27
Additional paid-in capital	403,573	402,529
Accumulated other comprehensive loss	(543)	(38)
Accumulated deficit	(71,301)	(81,034)
Total stockholders’ equity	331,757	321,484
Total liabilities, preferred stock and stockholders’ equity	$ 343,472	$ 356,168