Annual report pursuant to Section 13 and 15(d)

Lease Obligations - Narrative (Details)

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Lease Obligations - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Lease liabilities   $ 229  
Lease expense   $ 527 $ 537
Richmond, California      
Debt Instrument [Line Items]      
Term of lease   5 years  
Operating Lease, Payments $ 300    
Operating Lease, Abatement $ 48    
Lease liabilities   $ 79  
Hamburg, Germany      
Debt Instrument [Line Items]      
Term of lease   5 years  
Renewal term of lease   5 years