Quarterly report pursuant to Section 13 or 15(d)

Debt (Details Textual)

v3.21.2
Debt (Details Textual)
9 Months Ended 12 Months Ended
Feb. 05, 2021
USD ($)
Apr. 15, 2019
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]        
Outstanding borrowings     $ 31,214,000 $ 38,867,000
Revolving Credit Facility        
Debt Instrument [Line Items]        
Long-term line of credit     30,804,000 0
Letters of credit outstanding     800,000 800,000
Gross availability     75,000,000 11,750,000
Outstanding borrowings     $ 30,804,000 0
The 2021 Credit Agreement        
Debt Instrument [Line Items]        
Percentage of total depreciation expense 50.00%      
Debt instrument, covenant, minimum fixed coverage ratio 1.20      
Debt instrument, covenant, maximum leverage ratio 3.50      
The 2021 Credit Agreement | Eurodollar Loan        
Debt Instrument [Line Items]        
Effective percentage     2.09%  
LIBOR rate     0.09%  
The 2021 Credit Agreement | ABR Loans        
Debt Instrument [Line Items]        
Effective percentage     4.25%  
Lender prime rate     3.25%  
The 2021 Credit Agreement | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate     2.00%  
The 2021 Credit Agreement | Base Rate | ABR Loans        
Debt Instrument [Line Items]        
Basis spread on variable rate     1.00%  
The 2021 Credit Agreement | Minimum | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate     2.00%  
The 2021 Credit Agreement | Minimum | Base Rate | ABR Loans        
Debt Instrument [Line Items]        
Basis spread on variable rate     1.00%  
The 2021 Credit Agreement | Maximum | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate     3.00%  
The 2021 Credit Agreement | Maximum | Base Rate | ABR Loans        
Debt Instrument [Line Items]        
Basis spread on variable rate     2.00%  
The 2021 Credit Agreement | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility $ 75,000,000      
Revolving credit facility 25,000,000      
Borrowings under revolving credit facility 30,000,000      
The 2021 Credit Agreement | Letter of Credit        
Debt Instrument [Line Items]        
Line of credit facility 7,000,000      
The 2015 Credit Agreement        
Debt Instrument [Line Items]        
Long-term line of credit 800,000      
The 2015 Credit Agreement | Revolving Credit Facility        
Debt Instrument [Line Items]        
Repayments $ 8,200,000      
Three Term Notes Associated With the 2015 Credit Agreement        
Debt Instrument [Line Items]        
Term notes       $ 37,900,000
Credit Facility | Eurodollar Loan        
Debt Instrument [Line Items]        
Effective percentage       2.19%
LIBOR rate       0.19%
Credit Facility | CB Floating Rate Loan        
Debt Instrument [Line Items]        
Effective percentage       2.25%
Credit Facility | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       2.00%
Credit Facility | London Interbank Offered Rate (LIBOR) | CB Floating Rate Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate, before margin rate       2.50%
Credit Facility | CB Floating Rate | CB Floating Rate Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       (1.00%)
Lender prime rate       3.25%
Credit Facility | Minimum | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       2.00%
Credit Facility | Minimum | Greater of Prime Rate or LIBOR Plus 2.5% | CB Floating Rate Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       (1.00%)
Credit Facility | Maximum | London Interbank Offered Rate (LIBOR) | Eurodollar Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       3.00%
Credit Facility | Maximum | Greater of Prime Rate or LIBOR Plus 2.5% | CB Floating Rate Loan        
Debt Instrument [Line Items]        
Basis spread on variable rate       0.25%
Credit Facility | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility       $ 11,800,000
Letters of credit outstanding       1,000,000
Line of credit facility, borrowing base       15,600,000
Financing Agreement        
Debt Instrument [Line Items]        
Outstanding borrowings     $ 410,000 $ 947,000
Financing Agreement | Medical Equipment        
Debt Instrument [Line Items]        
Line of credit facility   $ 2,000,000    
Debt term   36 months    
Outstanding borrowings     $ 400,000