Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 128,885,000	$ 177,947,000
Short-term marketable securities	151,827,000	0
Accounts receivable	30,000,000	0
Prepaid expenses and other current assets	8,507,000	10,951,000
Total current assets	319,219,000	188,898,000
Property and equipment, net	3,985,000	1,968,000
Operating lease right-of-use assets	10,475,000	12,889,000
Other assets, noncurrent	661,000	2,356,000
Total assets	334,340,000	206,111,000
Current liabilities:
Accounts payable	13,951,000	12,321,000
Accrued expenses	43,184,000	28,716,000
Deferred revenue	30,610,000	3,944,000
Operating lease liabilities	2,798,000	2,303,000
Other current liabilities	990,000	239,000
Total current liabilities	91,533,000	47,523,000
Operating lease liabilities, noncurrent	8,575,000	11,247,000
Long-term debt, net	24,929,000	24,626,000
Deferred revenue, noncurrent	117,043,000	0
Other liabilities, noncurrent	203,000	974,000
Total liabilities	242,283,000	84,370,000
Commitments (Note 15)
Stockholders' equity
Preferred stock, $0.0001 par value; 25,000,000 shares authorized; 0 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively	0	0
Common stock, $0.0001 par value; 350,000,000 and 175,000,000 shares authorized at December 31, 2022 and December 31, 2021, respectively; 105,144,864 and 73,709,056 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively	11,000	7,000
Additional paid-in capital	746,889,000	572,213,000
Accumulated other comprehensive loss	(152,000)	0
Accumulated deficit	(654,691,000)	(450,479,000)
Total stockholders’ equity	92,057,000	121,741,000
Total liabilities and stockholders’ equity	$ 334,340,000	$ 206,111,000
Common stock, shares authorized (in shares)	350,000,000	175,000,000