Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 212,331	$ 238,940
Restricted cash, current	1,167	1,217
Accounts receivable, net	2,928	517
Prepaid expenses and other current assets	4,406	4,844
Total current assets	220,832	245,518
Property and equipment, net	10,056	4,501
Operating lease right-of-use assets	4,260	0
Restricted cash, non-current	75	75
Other non-current assets	261	105
Total assets	235,484	250,199
Current liabilities:
Accounts payable	1,745	1,572
Accrued and other current liabilities	6,615	6,487
Operating lease liabilities, current	1,310	0
Deferred revenue	6,859	3,663
Notes payable, current	1,817	1,900
Total current liabilities	18,346	13,622
Notes payable, non-current	1,483	1,869
Operating lease liabilities, non-current	3,612	0
Earnout warrant liabilities	636	1,476
Public warrant liabilities	8,042	18,666
Private warrant liabilities	3,815	8,855
Other non-current liabilities	101	552
Total liabilities	36,035	45,040
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred stock ($0.0001 par value; 200,000,000 shares authorized, none issued and outstanding as of March 31, 2022 and December 31, 2021)	0	0
Common stock ($0.0001 par value; 2,000,000,000 shares authorized, 152,606,563 and 151,839,058 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively)	16	16
Additional paid-in capital	745,752	745,753
Accumulated deficit	(546,319)	(540,610)
Total stockholders' equity	199,449	205,159
Total liabilities and stockholders’ equity	$ 235,484	$ 250,199