Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 112,708	$ 238,940
Restricted cash, current	1,167	1,217
Accounts receivable, net	2,490	451
Accounts receivable, net - related parties	57	66
Short-term investments	79,456	0
Prepaid expenses and other current assets	3,496	4,844
Total current assets	199,374	245,518
Property and equipment, net	12,461	4,501
Operating lease right-of-use assets	3,980	0
Restricted cash, non-current	75	75
Other non-current assets	234	105
Total assets	216,124	250,199
Current liabilities:
Accounts payable	1,435	1,572
Accrued and other current liabilities	8,445	6,487
Accrued product warranties	1,158	0
Operating lease liabilities, current	1,345	0
Deferred revenue	6,803	3,663
Notes payable, current	2,828	1,900
Total current liabilities	22,014	13,622
Notes payable, non-current	0	1,869
Operating lease liabilities, non-current	3,264	0
Earnout warrant liabilities	198	1,476
Public warrant liabilities	2,508	18,666
Private warrant liabilities	1,190	8,855
Other non-current liabilities	96	552
Total liabilities	29,270	45,040
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock ($0.0001 par value; 200,000,000 shares authorized, none issued and outstanding as of June 30, 2022 and December 31, 2021)	0	0
Common stock ($0.0001 par value; 2,000,000,000 shares authorized, 152,815,648 and 151,839,058 shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively)	16	16
Additional paid-in capital	748,745	745,753
Accumulated deficit	(561,907)	(540,610)
Total stockholders' equity	186,854	205,159
Total liabilities and stockholders’ equity	$ 216,124	$ 250,199