Annual report pursuant to Section 13 and 15(d)

Debt (Details Textual)

v3.22.0.1
Debt (Details Textual)
3 Months Ended 12 Months Ended
Feb. 05, 2021
USD ($)
Apr. 15, 2019
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]          
Outstanding borrowings     $ 33,397,000 $ 33,397,000 $ 38,867,000
Revolving Facility          
Debt Instrument [Line Items]          
Long-term line of credit     32,974,000 32,974,000 0
Letters of credit outstanding     600,000 600,000 800,000
Line of credit facility, current borrowing capacity     75,000,000 75,000,000 11,750,000
Outstanding borrowings     $ 32,974,000 $ 32,974,000 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]          
Debt instrument, interest rate, effective percentage     2.11% 2.11%  
LIBOR rate     0.11% 0.11%  
The 2021 Credit Agreement | ABR Loans          
Debt Instrument [Line Items]          
Debt instrument, interest rate, effective percentage     4.25% 4.25%  
Lender prime rate     3.25% 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 Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 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, maximum borrowing capacity 7,000,000        
The 2015 Credit Agreement          
Debt Instrument [Line Items]          
Long-term line of credit 800,000        
The 2015 Credit Agreement | Revolving 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]          
Debt instrument, interest rate, effective percentage         2.19%
LIBOR rate         0.19%
Credit Facility | CB Floating Rate Loan          
Debt Instrument [Line Items]          
Debt instrument, interest rate, 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]          
Debt instrument, 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 Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity         $ 11,800,000
Letters of credit outstanding         1,000,000
Line of credit facility, borrowing base         15,600,000
Other financing          
Debt Instrument [Line Items]          
Outstanding borrowings     $ 423,000 $ 423,000 $ 947,000
Other financing | Medical Equipment          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity   $ 2,000,000      
Debt instrument, term   36 months      
Interest expense, debt     200,000    
Outstanding borrowings     $ 400,000 $ 400,000