BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 226,006	$ 78,446
Short-term investments, available-for-sale	10,973	215,154
Prepaid expenses and other current assets	3,543	3,097
Total current assets	240,522	296,697
Investments, available-for-sale	43,386	0
Property and equipment, net	2,413	1,981
Other assets	12,321	319
Total assets	298,642	298,997
Current liabilities:
Accounts payable	1,886	757
Accrued liabilities	13,265	8,245
Total current liabilities	15,151	9,002
Other Liabilities, Noncurrent	10,515	219
Total liabilities	25,666	9,221
Commitments and contingencies (Note 11)
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 200,000,000 shares and no shares authorized at December 31, 2020 and December 31, 2019, respectively; no shares issued and outstanding at December 31, 2020 and December 31, 2019, respectively	0	0
Common stock, $0.0001 par value; 1,000,000,000 shares authorized; 39,430,120 and 36,672,415 shares issued and outstanding at December 31, 2021 and 2020, respectively	4	4
Additional paid-in capital	518,183	456,196
Adjustment to opening balance of accumulated deficit	(245,108)	(166,393)
Accumulated other comprehensive loss	(103)	(31)
Total stockholders' equity	272,976	289,776
Total liabilities and stockholders' equity	$ 298,642	$ 298,997