BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 34,091	$ 135,173
Marketable securities	300,514
Restricted cash	1,706	460
Prepaid expenses and other current assets	3,684	152
Total current assets	339,995	135,785
Property and equipment, net	12,090	11,407
Other assets	4,083	436
Total assets	356,168	147,628
Current liabilities:
Accounts payable	1,861	2,483
Accrued liabilities	4,871	2,411
Deferred rent, current portion	215	28
Term loan, current portion	1,667	387
Deferred revenue, current portion	6,428	4,989
Total current liabilities	15,042	10,298
Deferred rent, net of current portion	359	242
Term loan, net of current portion	3,333	73
Deferred revenue, net of current portion	15,950	21,736
Total liabilities	34,684	32,349
Redeemable preferred stock:
Total redeemable preferred stock		162,223
Stockholders’ equity (deficit):
Preferred stock; par value of $0.001 per share, 10,000,000 and 0 shares authorized at December 31, 2019 and 2018. No shares issued and outstanding at December 31, 2019 and 2018, respectively
Common stock, par value of $0.001 per share; 100,000,000 and 158,745,671 shares authorized at December 31, 2019 and 2018, respectively, 27,499,260 and 1,374,812 shares issued and outstanding at December 31, 2019 and 2018, respectively	27	1
Additional paid-in capital	402,529	352
Accumulated other comprehensive loss	(38)
Accumulated deficit	(81,034)	(47,297)
Total stockholders’ equity (deficit)	321,484	(46,944)
Total liabilities, preferred stock and stockholders’ equity (deficit)	$ 356,168	147,628
Series A Preferred Stock
Redeemable preferred stock:
Total redeemable preferred stock		71,000
Series B Preferred Stock
Redeemable preferred stock:
Total redeemable preferred stock		$ 91,223