XML 22 R12.htm IDEA: XBRL DOCUMENT v3.22.1
Accrued Expenses and Other Current Liabilities
 3 Months Ended
Mar. 31, 2022
Accrued Liabilities, Current [Abstract]  
Accrued Expenses and Other Current Liabilities Accrued Expenses and Other Current Liabilities
Accrued expenses consisted of the following (in thousands):
March 31,
2022		December 31,
2021
Accrued property and equipment purchases$9,859 $34,375 
Accrued research and development costs18,716 23,994 
Accrued professional fees13,747 9,239 
Accrued battery supplier costs— 10,000 
Other accrued expenses9,650 6,317 
Total accrued expenses$51,972 $83,925