Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Summary of Debt (Details)

v3.20.4
Long-term Debt - Summary of Debt (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Dec. 20, 2018
Line of Credit Facility [Line Items]        
Long-term debt, excluding current maturities $ 60,495,000 $ 71,554,000    
Current portion of long-term debt 875,000 4,000,000    
Long-term debt outstanding 61,370,000 75,554,000    
ABL Line Of Credit, Due December 20, 2021 | Revolving Line of Credit        
Line of Credit Facility [Line Items]        
Long-term debt, excluding current maturities 49,037,000 59,221,000    
Principal amount of debt 100,000,000      
Term Loan        
Line of Credit Facility [Line Items]        
Principal amount of debt     $ 20,000,000 $ 20,000,000
Term Loan | Secured Debt        
Line of Credit Facility [Line Items]        
Long-term debt, excluding current maturities 11,458,000 12,333,000    
Long-term debt outstanding 12,300,000 $ 16,300,000    
Principal amount of debt $ 20,000,000     $ 20,000,000