CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 20,684	$ 21,392
Available-for-sale investments	79,792	78,537
Accounts receivable	5,232	5,029
Prepaid expenses and other current assets	3,959	2,709
Total current assets	109,667	107,667
Property and equipment, net	45,651	44,483
Operating lease right-of-use assets	6,850	7,634
Other assets	244	129
Total assets	162,412	159,913
Current liabilities:
Accounts payable	1,843	5,772
Accrued expenses and other current liabilities	7,609	8,563
Deferred revenue	836	343
Current portion of debt	13,042	12,164
Current portion of operating lease liabilities	2,234	2,210
Total current liabilities	25,564	29,052
Debt, less current portion	3,364	9,894
Operating lease liabilities, less current portion	5,455	6,297
Derivative warrant liabilities	3,410	2,927
Earn-out liabilities	2,461	2,155
Total liabilities	40,254	50,325
Commitments and contingencies (Note 17)
Stockholders' equity:
Preferred stock, par value $0.0001 per share, 10,000,000 shares authorized, none outstanding	0	0
Common stock, par value $0.0001 per share, 1,000,000,000 shares authorized, 179,596,760 shares issued and outstanding at June 30, 2024 and 147,066,336 shares issued and outstanding at December 31, 2023	17	14
Additional paid-in capital	508,971	463,089
Accumulated other comprehensive income	123	244
Accumulated deficit	(386,953)	(353,759)
Total stockholders' equity	122,158	109,588
Total liabilities and stockholders' equity	$ 162,412	$ 159,913