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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, Fair Value of Financial Instruments (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2023
Clinic
May 31, 2023
Clinic
Feb. 28, 2023
Clinic
Nov. 30, 2022
Clinic
Oct. 31, 2022
USD ($)
Clinic
Sep. 30, 2022
Clinic
Aug. 31, 2022
Clinic
Mar. 31, 2022
Clinic
Sep. 30, 2023
USD ($)
Sep. 30, 2023
USD ($)
Clinic
Dec. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Fair Value of Financial Instruments [Abstract]                        
Increase in put right                 $ 0.1 $ 0.3    
Put right value                 $ 3.9 $ 3.9 $ 3.5  
Number of clinics | Clinic                   672    
Volatility [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Debt instrument, measurement input                 0.25 0.25    
Discount Rate [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Debt instrument, measurement input                 0.119 0.119    
Clinic Practice [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Percentage of interest acquired 70.00% 75.00% 80.00% 80.00% 60.00% 80.00% 70.00% 70.00%        
Number of clinics | Clinic 5 4 1 13 14 2 6 6        
Contingent payments         $ 8.1       $ 8.1 $ 8.1 $ 8.3  
Clinic Practice [Member] | Volatility [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Debt instrument, measurement input                 0.35 0.35    
Clinic Practice [Member] | Discount Rate [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Debt instrument, measurement input                 0.087 0.087    
October 2022 Acquisition [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Percentage of interest acquired [1]                 60.00% 60.00%    
Number of clinics | Clinic                   14    
Contingent consideration decreased                 $ (0.2) $ (0.2)    
Interest Rate Swap [Member]                        
Fair Value of Financial Instruments [Abstract]                        
Notional value                       $ 150.0
Debt instrument, maturity date                   Jun. 30, 2027    
Interest rate derivative                 7.7 $ 7.7    
Unrealized gain from interest rate swap                 $ 1.0 $ 1.7    
[1] * See Note 3 for additional information on the acquisitions in the table.