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Debt - ABL Credit Facility (Details) - Revolving Credit Facility - USD ($)
Mar. 31, 2021
Dec. 31, 2020
ABL Revolver    
Debt Instrument [Line Items]    
Outstanding receivable advance balance $ 0  
Line of credit facility, borrowing base 70,500,000  
ABL Credit Facility due 2022    
Debt Instrument [Line Items]    
Letters of credit outstanding, amount $ 12,900,000 $ 1,700,000