CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 257,165	$ 11,362
Restricted cash, current	276	276
Accounts receivable, net	2,467	2,327
Inventory, net	5,293	4,817
Prepaid expenses and other current assets	4,097	2,441
Total current assets	269,298	21,223
Property and equipment, net	9,101	9,731
Operating lease, right-of-use assets	10,551	11,071
Restricted cash, non-current	1,004	1,004
Other non-current assets	62	3,385
Total assets	290,016	46,414
Current liabilities:
Accounts payable	3,933	6,894
Accrued and other current liabilities	4,645	4,121
Short-term debt	0	7,130
Operating lease liability, current portion	2,833	2,772
Total current liabilities	11,411	20,917
Operating lease liability, long-term portion	11,169	11,908
Warrant liabilities (At March 31, 2021 and December 31, 2020 related party $5,154 and Nil, respectively)	14,725	49,293
Other non-current liabilities	956	978
Total liabilities	38,261	83,096
Commitments and contingencies (Note 7)
Redeemable convertible preferred stock, $0.0001 par value per share; Nil and 131,411,372 shares authorized at March 31, 2021 and December 31, 2020; Nil and 88,434,754 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively (aggregate liquidation preference of Nil and $41,791 at March 31, 2021 and December 31, 2020, respectively)	0	39,225
Stockholders’ equity / (deficit):
Common stock, $0.0001 par value; 1,000,000,000 and 210,956,516 shares authorized at March 31, 2021 and December 31, 2020, respectively; 161,449,205 and 33,327,294 issued and outstanding at March 31, 2021 and December 31, 2020, respectively	16	0
Preferred stock, $0.0001 par value; 100,000,000 and Nil shares authorized at March 31, 2021 and December 31, 2020, respectively; Nil and Nil issued and outstanding at March 31, 2021 and December 31, 2020, respectively	0	0
Additional paid-in capital	482,071	133,468
Accumulated deficit	(230,332)	(209,375)
Total stockholders’ equity / (deficit)	251,755	(75,907)
Total liabilities, redeemable convertible preferred stock, and stockholders’ equity / (deficit)	$ 290,016	$ 46,414