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Organization, Nature of Operations and Basis of Presentation - Acquisition (Details) |  |  |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 Clinic | Jun. 30, 2021 Clinic | Mar. 31, 2021 Clinic | Nov. 30, 2020 Clinic | Sep. 30, 2020 Contract | Feb. 27, 2020 Partnership Clinic | Sep. 30, 2019 Clinic | Aug. 31, 2018 Clinic | Dec. 31, 2021 Clinic Segment Partnership | Dec. 31, 2020 Clinic Partnership | Dec. 31, 2019 Partnership | Nov. 30, 2021
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | Segment |  |  |  |  |  |  |  |  |  | 2 |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 5 | 3 |  |
Number of partnerships | Partnership |  |  |  |  |  |  |  |  |  | 5 | 5 | 4 |
Multi-Clinic Practices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 7 |  |  |
IIPS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  |  |  |  |  |  |  |  |  | 70.00%
Number of clinics |  |  |  |  |  |  |  |  |  | 3 |  |  |
Remaining contract term |  |  |  |  |  |  |  |  |  | 5 years |  |  |
December 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Dec. 31, 2021 |  |  |
Percentage of interest acquired |  | 75.00% |  |  |  |  |  |  |  | 75.00% |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 3 |  |  |
November 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Nov. 30, 2021 |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  |  |  |  |  | 70.00% |  |  |
Number of clinics | [1] |  |  |  |  |  |  |  |  |  |  |  |
September 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Sep. 30, 2021 |  |  |
Percentage of interest acquired |  | 100.00% |  |  |  |  |  |  |  | 100.00% |  |  |
Number of clinics | [1] |  |  |  |  |  |  |  |  |  |  |  |
June 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Jun. 30, 2021 |  |  |
Percentage of interest acquired |  | 65.00% |  |  |  |  |  |  |  | 65.00% |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 8 |  |  |
March 2021 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Mar. 31, 2021 |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  |  |  |  |  | 70.00% |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 6 |  |  |
November 2020 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Nov. 30, 2020 |  |  |
Percentage of interest acquired |  | 75.00% |  |  |  |  |  |  |  | 75.00% |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 3 |  |  |
September 2020 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Sep. 30, 2020 |  |  |
Percentage of interest acquired |  | 70.00% |  |  |  |  |  |  |  | 70.00% |  |  |
Number of clinics | [2],[3] |  |  |  |  |  |  |  |  |  |  |  |
February 2020 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Feb. 27, 2020 |  |  |
Percentage of interest acquired | [4] | 65.00% |  |  |  |  |  |  |  | 65.00% |  |  |
Number of clinics |  |  |  |  |  |  |  |  |  | 4 |  |  |
September 2019 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Sep. 30, 2019 |  |  |
Percentage of interest acquired |  | 67.00% |  |  |  |  |  | 67.00% |  | 67.00% |  |  |
Number of clinics |  |  |  |  |  |  |  | 11 |  | 11 |  |  |
April 2019 Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition date |  |  |  |  |  |  |  |  |  | Apr. 11, 2019 |  |  |
Percentage of interest acquired |  | 100.00% |  |  |  |  |  |  | 100.00% | 100.00% |  |  |
Number of clinics | [1] |  |  |  |  |  |  |  |  |  |  |  |
Management Contracts [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  |  | 70.00% |  |  |  |  |  |  |
Number of management contracts | Contract |  |  |  |  |  | 6 |  |  |  |  |  |  |
Remaining contract term |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Clinic Practice [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  | 75.00% | 65.00% | 70.00% | 75.00% |  | 65.00% |  |  | 75.00% |  |  |
Number of clinics |  | 3 | 8 | 5 | 3 |  | 4 |  |  |  |  |  |
Number of partnerships | Partnership |  |  |  |  |  |  | 4 |  |  |  |  |  |
Clinic Practice [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  | 5.00% |  |  |  |  | 10.00% |  |  | 5.00% | 20.00% | 1.00% |
Clinic Practice [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  | 35.00% |  |  |  |  | 83.80% |  |  | 35.00% | 35.00% | 20.00% |
[1] | Industrial injury prevention business
[2] | The business includes six management and services contracts which have been in place for a number of years. As of the date acquired, the contracts had a remaining term of five years.
[3] | The business includes six management and services contracts which have been in place for a number of years. As of the date acquired, the contracts had a remaining term of five years.
[4] | The four clinics are in four separate partnerships. The Company's interest in the four partnerships range from 10.0% to 83.8%, with an overall 65.0% based on the initial purchase transaction.

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