Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 124,766	$ 144,885
Amounts due from related parties	399	393
Prepaid expenses and other current assets	8,183	8,851
Total current assets	133,348	154,129
Property and equipment, net	12,594	12,173
Long-term prepaid fixed assets	157	199
Long-term deposits	1,351	0
Restricted cash	78	172
Total assets	147,528	166,673
Current liabilities:
Accounts payable	1,460	3,192
Amounts due to related parties	16,787	19,407
Accrued expense and other current liabilities	5,784	4,519
Notes payable	380	376
Total current liabilities	24,411	27,494
Other liabilities
Notes payable, net of current portion	10,226	10,323
Other long-term liabilities	236	237
Total liabilities	34,873	38,054
Preferred stock: $0.0001 par value,50,000,000 shares authorized at March 31, 2022 and December 31, 2021	0	0
Stockholders' Equity:
Additional paid-in capital	360,121	357,822
Accumulated deficit	(247,744)	(229,481)
Total stockholders equity (deficit)	112,655	128,619
Total liabilities, convertible preferred stock, and stockholders equity (deficit)	147,528	166,673
Class A Common Stock [Member]
Stockholders' Equity:
Common stock:	278	278
Common Class B [Member]
Stockholders' Equity:
Common stock:	$ 0	$ 0