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Acquisition - Related Fair Values (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Apr. 09, 2021
Business Acquisition [Line Items]      
Goodwill $ 4,331 $ 4,331  
Hi-Power      
Business Acquisition [Line Items]      
Inventory     $ 2,666
Vendor deposits     818
Property, plant and equipment, net     74
Goodwill     4,331
Accounts payable and accrued expenses     (3,634)
Provision for firm purchase commitments     (3,890)
Net assets acquired, net of cash and cash equivalents of $53     365
Cash and cash equivalents     $ 53