Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 153,477	$ 183,403
Marketable securities	150,906	141,815
Restricted cash	0	64
Prepaid expenses and other current assets	7,649	6,498
Total current assets	312,032	331,780
Property and equipment, net	4,305	5,320
Operating lease right-of-use assets	6,572	5,477
Other assets	629	1,080
Total assets	323,538	343,657
Current liabilities
Accounts payable	363	3,244
Accrued research and development expenses	20,746	16,205
Accrued expenses and other current liabilities	31,536	20,410
Total current liabilities	52,645	39,859
Long-term convertible senior notes	195,496	150,038
Debt, non-current portion	14,834	29,079
Operating lease liabilities - long-term	4,212	3,218
Total liabilities	267,187	222,194
Commitments and contingencies (Note 9)
Stockholders' equity
Common stock, $0.0001 par value; 700,000,000 shares authorized as of September 30, 2022 and December 31, 2021; 94,135,098 shares issued and 93,914,200 shares outstanding as of September 30, 2022, and 76,470,588 shares issued and 75,752,664 shares outstanding as of December 31, 2021	10	8
Additional paid-in capital	1,033,385	932,944
Accumulated deficit	(976,459)	(811,534)
Accumulated other comprehensive (loss) income	(585)	45
Total stockholders' equity	56,351	121,463
Total liabilities and stockholders' equity	$ 323,538	$ 343,657