Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Narrative (Details)

v3.20.2
Long-term Debt - Narrative (Details)
 3 Months Ended 6 Months Ended
Jan. 01, 2019
USD ($)
Dec. 20, 2018
USD ($)
debt_installment
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 19, 2018
USD ($)
Line of Credit Facility [Line Items]              
Repayments of debt, number of consecutive installments | debt_installment   60          
Asset impairments     $ 6,079,000 $ 0 $ 6,079,000 $ 0  
$20 million Term loan, due January 1, 2024              
Line of Credit Facility [Line Items]              
Debt term 5 years 5 years          
Principal amount of debt $ 20,000,000 $ 20,000,000          
$20 million Term loan, due January 1, 2024 | London Interbank Offered Rate (LIBOR)              
Line of Credit Facility [Line Items]              
Basis spread   1.90%          
Revolving Credit Facility              
Line of Credit Facility [Line Items]              
Minimum fixed charge coverage ratio         1.25    
Covenants, minimum tangible net worth     60,000,000.0   $ 60,000,000.0    
Minimum fixed charge coverage ratio actual         1.39    
Covenants, minimum tangible net worth actual     67,400,000   $ 67,400,000    
Revolving Credit Facility | $100 million Revolving line of credit, due December 20, 2021              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity   $ 100,000,000         $ 80,000,000
Remaining borrowing capacity     7,200,000   7,200,000    
Revolving Credit Facility | $100 million Revolving line of credit, due December 20, 2021 | London Interbank Offered Rate (LIBOR)              
Line of Credit Facility [Line Items]              
Basis spread   1.65%          
Palmer of Texas              
Line of Credit Facility [Line Items]              
Asset impairments     $ 6,100,000   $ 6,000,000.0