Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 14,105	$ 34,605
Investments	275,950	280,462
Prepaid expenses and other current assets	7,292	4,487
Total current assets	297,347	319,554
Property and equipment, net	791	385
Restricted cash	1,223	1,223
Right-of-use asset	13,798	8,402
Other non-current assets	100	106
Total assets	313,259	329,670
Current liabilities:
Accounts payable	4,616	2,538
Accrued expenses and other current liabilities	14,088	11,680
Total current liabilities	18,704	14,218
Non-current operating lease liability	13,802	7,694
Total liabilities	32,506	21,912
Commitments and contingencies (Note 11)	0	0
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares and 10,000,000 shares authorized at March 31, 2021 and December 31, 2020, respectively; no shares issued or outstanding at March 31, 2021 and December 31, 2020	0	0
Common stock; $0.0001 par value; 500,000,000 shares authorized at March 31, 2021 and 500,000,000 shares authorized at December 31, 2020; 36,147,212 shares issued and outstanding at March 31, 2021 and 36,078,383 shares issued and outstanding at December 31, 2020	5	5
Additional paid-in capital	428,938	425,363
Accumulated other comprehensive income	335	614
Accumulated deficit	(148,525)	(118,224)
Total stockholders' equity	280,753	307,758
Total liabilities and stockholders' equity	$ 313,259	$ 329,670