Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of interest expense on prepetition obligations included in the statement of operations.

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The number of businesses acquired by the entity during the period.

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The number of states the entity operates in as of the balance sheet date.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Number of businesses merged during the period.

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Number of clinics operated during the period.

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Number of client locations that included in total operated states that are providing industrial injury prevention services.

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Number of regions of the entity operates.

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Number of third party facilities.

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Percentage of combined business interest owned during the period.

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Percentage of general partnership interest owned during the period.

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Percentage of limited partnership interest owned during the period.

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Refers to the commencement period of redemption rights for redeemable non controlling interest.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)					3 Months Ended	12 Months Ended
	Apr. 11, 2019 USD ($) State Location	Aug. 31, 2018 Clinic	Apr. 30, 2018 Business	Feb. 28, 2018 Clinic	Mar. 31, 2019 USD ($) Clinic State Facility Region	Dec. 31, 2018 USD ($) Clinic	May 31, 2017
Basis of Presentation [Abstract]
Percentage of general partnership interest owned					1.00%
Number of clinic practices acquired \| Clinic		4		2		5
Number of clinics operated \| Clinic					590
Number of states where clinics are operated \| State					41
Number of third party facilities \| Facility					28
Goodwill [Abstract]
Number of regions \| Region					6
Income Taxes [Abstract]
Unrecognized tax benefit					$ 0
Accrued interest and penalties associated with any unrecognized tax benefits					0
Interest expense recognized					0
Recently Adopted Accounting Guidance [Abstract]
Operating lease right-of-use assets					77,870,000	$ 0
Lease Liability					82,567,000
Subsequent Event [Member]
Basis of Presentation [Abstract]
Percentage of combined business interest owned	76.00%
ASU 2016-02 [Member]
Recently Adopted Accounting Guidance [Abstract]
Operating lease right-of-use assets					78,000,000
Lease Liability					$ 82,600,000
March 2017 Acquisition [Member]
Basis of Presentation [Abstract]
Percentage of interest acquired					55.00%
Industrial Injury Prevention [Member]
Basis of Presentation [Abstract]
Percentage of interest acquired			65.00%				55.00%
Number of businesses merged \| Business			2
Percentage of combined business interest owned			59.45%
Industrial Injury Prevention [Member] \| Subsequent Event [Member]
Basis of Presentation [Abstract]
Number of states where clinics are operated \| State	45
Subsequent Events [Abstract]
Number of onsite client locations \| Location	11
Total consideration	$ 23,600,000
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					49.00%
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]
Percentage of limited partnership interest owned					99.00%
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