Quarterly report pursuant to Section 13 or 15(d)

LIABILITIES AND LONG-TERM DEBT LIABILITIES AND LONG-TERM DEBT - Additional Information (Details)

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LIABILITIES AND LONG-TERM DEBT LIABILITIES AND LONG-TERM DEBT - Additional Information (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
May 06, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Jun. 30, 2020
Line of Credit Facility [Line Items]            
Long-term debt $ 47,143,000   $ 47,143,000   $ 83,289,000  
Additions to CARES Act, PPP Loans     6,123,000 $ 0    
Debt issuance costs 513,000   513,000   $ 649,000  
ARC Agreement, Fourth Amendment            
Line of Credit Facility [Line Items]            
Debt issuance costs $ 900,000   $ 900,000      
ARC Agreement, Fourth Amendment | TOCCO            
Line of Credit Facility [Line Items]            
Consolidated leverage ratio, minimum required 3.50   3.50      
Consolidated leverage ratio 1.62   1.62     2.62
Consolidated fixed charge coverage ratio, minimum required 1.15   1.15      
Consolidated fixed charge coverage ratio     1.68   1.98  
Term Loan Facility            
Line of Credit Facility [Line Items]            
Long-term debt $ 47,656,000   $ 47,656,000   $ 80,938,000  
PPP Loans | CARES Act            
Line of Credit Facility [Line Items]            
Additions to CARES Act, PPP Loans   $ 6,100,000        
Borrowing rate (percentage)   1.00%        
Revolving Facility            
Line of Credit Facility [Line Items]            
Long-term debt 0   0   $ 3,000,000  
Revolving Facility | ARC Agreement, Fourth Amendment            
Line of Credit Facility [Line Items]            
Available remaining borrowing capacity $ 56,000,000   $ 56,000,000      
Effective interest rate (percentage) 2.84%   2.84%      
Term Loan | Term Loan Facility            
Line of Credit Facility [Line Items]            
Repayments of lines of credit $ 60,000,000          
Long-term line of credit $ 30,000,000   $ 30,000,000