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Long-Term Debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Long-Term Debt        
Loss on extinguishment of debt   $ 17,686 $ (518)  
Percent of securities in foreign subsidiaries guaranteed to secure debt 65.00%      
Principal payments of long term debt        
December 31, 2022 $ 105,904      
December 31, 2023 72,955      
Incremental term loan 128,000      
Secured term loan facility | Loan and security agreement        
Long-Term Debt        
Borrowing   $ 100,000    
Interest rate (as a percent)   9.50% 12.00%  
Term Loan facility        
Principal payments of long term debt        
Incremental term loan 118,900      
Term Loan facility | United Hydrogen Group Inc        
Principal payments of long term debt        
Incremental term loan $ 9,100      
Generate Lending, LLC | Secured term loan facility | Loan and security agreement        
Long-Term Debt        
Loan Amount       $ 100,000