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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details) |  |  |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) Clinic Location State | Dec. 31, 2021 Clinic | Jun. 30, 2021 Clinic | Mar. 31, 2021 USD ($) Clinic | Mar. 31, 2022 USD ($) Clinic Segment Facility Location State | Mar. 31, 2021 USD ($) Region | Mar. 31, 2020 Region | Nov. 30, 2021 | Apr. 30, 2020 USD ($)
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Number of reportable segments | Segment |  |  |  |  |  | 2 |  |  |  |
Number of businesses acquired |  |  |  |  |  | 601 |  |  |  |
Number of states where clinics are operated | State |  | 39 |  |  |  | 39 |  |  |  |
Percentage of general partnership interest owned |  |  |  |  |  | 1.00% |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Impairment of long lived assets to be disposed of | $ |  |  |  |  |  | $ 0 |  |  |  |
Goodwill [Abstract] |  |  |  |  |  |  |  |  |  |
Number of business segments | Segment |  |  |  |  |  | 2 |  |  |  |
Number of regions | Region |  |  |  |  |  |  | 6 | 6 |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefit | $ |  |  |  |  |  | $ 0 |  |  |  |
Accrued interest and penalties associated with any unrecognized tax benefits | $ |  | $ 0 |  |  |  | 0 |  |  |  |
Interest expense recognized | $ |  |  |  |  |  | 0 |  |  |  |
Fair Value of Financial Instruments [Abstract] |  |  |  |  |  |  |  |  |  |
Decrease in put right | $ |  |  |  |  |  | (603,000) |  |  |  |
Put right value | $ |  | $ 2,900,000 |  |  |  | $ 2,900,000 |  |  |  |
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |
Number of business segments | Segment |  |  |  |  |  | 2 |  |  |  |
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 |  | 0.0993 |  |  |  | 0.0993 |  |  |  |
Medicare Accelerated and Advance Payments Program [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Repayment of funds | $ |  |  |  |  | $ 14,100,000 |  | $ 14,100,000 |  |  |
Advance payments | $ |  | $ 0 |  |  | $ 0 | $ 0 | $ 0 |  |  | $ 14,100,000
Public Health and Social Services Emergency Fund [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Grants and other funds | $ |  | $ 100,000,000,000.0 |  |  |  | $ 100,000,000,000.0 |  |  |  |
Multi-Clinic Practices [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Number of businesses acquired |  |  |  |  |  | 4 |  |  |  |
Clinic Practice [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  | 70.00% | 75.00% | 65.00% | 70.00% | 70.00% | 70.00% |  | 70.00% |
Number of businesses acquired |  | 6 | 3 | 8 | 5 |  |  |  |  |
IIPS [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Number of businesses acquired |  |  |  |  |  | 2 |  |  |  |
March 2022 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Mar. 31, 2022 |  |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  | 70.00% |  |  |  |
Number of businesses acquired |  |  |  |  |  | 6 |  |  |  |
December 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Dec. 31, 2021 |  |  |  |
Percentage of interest acquired |  | 75.00% |  |  |  | 75.00% |  |  |  |
Number of businesses acquired |  |  |  |  |  | 3 |  |  |  |
November 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Nov. 30, 2021 |  |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  | 70.00% |  |  |  |
Number of businesses acquired | [1] |  |  |  |  |  |  |  |  |
September 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Sep. 30, 2021 |  |  |  |
Percentage of interest acquired |  | 100.00% |  |  |  | 100.00% |  |  |  |
Number of businesses acquired | [1] |  |  |  |  |  |  |  |  |
June 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Jun. 30, 2021 |  |  |  |
Percentage of interest acquired |  | 65.00% |  |  |  | 65.00% |  |  |  |
Number of businesses acquired |  |  |  |  |  | 8 |  |  |  |
March 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  | Mar. 31, 2021 |  |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  | 70.00% |  |  |  |
Number of businesses acquired |  |  |  |  |  | 6 |  |  |  |
Management Contracts [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Number of third party facilities | Facility |  |  |  |  |  | 38 |  |  |  |
Employee [Member] |  |  |  |  |  |  |  |  |  |
Restricted Stock [Abstract] |  |  |  |  |  |  |  |  |  |
Period in which restrictions lapse on stock granted |  |  |  |  |  | 4 years |  |  |  |
Director [Member] |  |  |  |  |  |  |  |  |  |
Restricted Stock [Abstract] |  |  |  |  |  |  |  |  |  |
Period in which restrictions lapse on stock granted |  |  |  |  |  | 1 year |  |  |  |
Officer [Member] |  |  |  |  |  |  |  |  |  |
Restricted Stock [Abstract] |  |  |  |  |  |  |  |  |  |
Period in which restrictions lapse on stock granted |  |  |  |  |  | 4 years |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Percentage of limited partnership interest owned |  |  |  |  |  | 10.00% |  |  |  |
Redeemable Non-Controlling Interests [Abstract] |  |  |  |  |  |  |  |  |  |
Redeemable non-controlling interest, redemption rights, commencement period |  |  |  |  |  | 3 years |  |  |  |
Minimum [Member] | Furniture & Equipment [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 3 years |  |  |  |
Minimum [Member] | Software [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 3 years |  |  |  |
Minimum [Member] | Leasehold Improvements [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 3 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |
Number of operating clinic locations | Location |  | 1 |  |  |  | 1 |  |  |  |
Percentage of limited partnership interest owned |  |  |  |  |  | 35.00% |  |  |  |
Redeemable Non-Controlling Interests [Abstract] |  |  |  |  |  |  |  |  |  |
Redeemable non-controlling interest, redemption rights, commencement period |  |  |  |  |  | 5 years |  |  |  |
Maximum [Member] | Furniture & Equipment [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 8 years |  |  |  |
Maximum [Member] | Software [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 7 years |  |  |  |
Maximum [Member] | Leasehold Improvements [Member] |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  | 5 years |  |  |  |
[1] | Industrial injury prevention services business

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