Schedule of Prepaid Expenses and Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Prepaid Expenses And Current Assets
Prepayment of fixed assets	$ 4,435	$ 2,715
Prepayment of inventory	483	59
Other	152	99
Total prepaid expenses and current assets	$ 5,070	$ 2,873