Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 259,682	$ 187,043
Prepaid expenses and other current assets	7,560	8,658
Total current assets	267,242	195,701
Property and equipment, net	3,064	3,696
Restricted cash	492	492
Other assets	436	625
Total assets	271,234	200,514
Current liabilities:
Accounts payable	2,682	3,949
Accrued expenses and other current liabilities	13,693	9,854
Deferred rent	239	214
Total current liabilities	16,614	14,017
Deferred rent, net of current portion	276	484
Total liabilities	16,890	14,501
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 10,000 shares authorized and no shares issued or outstanding as of December 31, 2020 and 2019
Common stock, $0.0001 par value; 150,000 shares authorized as of December 31, 2020 and 2019; 41,569 and 31,673 shares issued as of December 31, 2020 and 2019, respectively; 41,569 and 31,643 shares outstanding as of December 31, 2020 and 2019, respectively	4	3
Additional paid-in capital	518,756	330,714
Accumulated deficit	(264,416)	(144,704)
Total stockholders’ equity	254,344	186,013
Total liabilities and stockholders' equity	$ 271,234	$ 200,514