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LONG-TERM DEBT (Details)
9 Months Ended
Oct. 14, 2020
USD ($)
nursing_center
Sep. 30, 2021
USD ($)
letter_of_credit
Jun. 10, 2021
USD ($)
Jun. 09, 2021
USD ($)
Dec. 31, 2020
USD ($)
Amended And Restated Credit Agreement          
Line of Credit Facility [Line Items]          
Debt instrument term 3 years        
Amended And Restated Credit Agreement | Revolvers          
Line of Credit Facility [Line Items]          
Borrowing capacity   $ 25,294,000      
Borrowings outstanding   $ 0     $ 0
Interest rate during period   5.00%      
Balance available for borrowing under revolving credit center   $ 12,843,000      
Amended Mortgage Loan | Mortgage          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 62,000,000        
Debt instrument term 3 years        
Period of amortization 25 years        
Borrowings outstanding   $ 60,127,000      
Interest rate during period   5.00%      
Number of owned nursing centers to secure Amended Mortgage Loan | nursing_center 15        
Amended Mortgage Loan | Mortgage | LIBOR          
Line of Credit Facility [Line Items]          
Interest rate percentage 4.00%        
Amended Mortgage Loan | Mortgage | Floor          
Line of Credit Facility [Line Items]          
Interest rate percentage 1.00%        
Amended Revolver | Revolvers          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 36,000,000   $ 35,000,000 $ 36,000,000  
Annual fees for letters of credit issued under revolver (as a percentage)   3.00%      
Number of letters of credit | letter_of_credit   4      
Letters of credit security deposit for a lease   $ 12,451,000      
Amended Affiliated Revolver | Revolvers          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 2,000,000   $ 3,000,000 $ 2,000,000