CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 59,552	$ 133,860
Marketable securities	158,565	123,876
Accounts receivable, net of allowance of $0 and $0, respectively	598	368
Inventory	4,854	3,945
Prepaid expenses and other current assets	2,901	4,261
Total current assets	226,470	266,310
Property and equipment, net	16,211	16,275
Internally developed software, net	124	532
Operating lease right-of-use assets	13,248	14,438
Other assets	695	695
Total assets	256,748	298,250
Current liabilities:
Accounts payable	1,379	1,766
Accrued payroll and payroll-related costs	2,883	4,943
Accrued contracted services	1,645	1,519
Accrued expenses and other current liabilities	3,446	1,815
Current portion of operating lease liabilities	1,655	1,566
Total current liabilities	11,008	11,609
Warrant liabilities	478	1,274
Operating lease liabilities	11	11
Other long-term liabilities	11,991	13,737
Total liabilities	23,488	26,631
Commitments and contingencies (Note 15)
Stockholders’ equity
Additional paid-in capital	771,460	767,239
Accumulated other comprehensive loss	(7)	0
Accumulated deficit	(538,207)	(495,634)
Total stockholders’ equity	233,260	271,619
Total liabilities and stockholders’ equity	256,748	298,250
Class A common stock
Stockholders’ equity
Common stock	12	12
Class B common stock
Stockholders’ equity
Common stock	$ 2	$ 2