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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Details)		1 Months Ended				3 Months Ended	12 Months Ended
	Feb. 28, 2018 USD ($) Clinic	Jan. 31, 2018 USD ($)	Nov. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Mar. 31, 2018 USD ($) Clinic	Dec. 31, 2017 Clinic	Dec. 05, 2013 USD ($)
Debt Instrument [Line Items]
Number of clinic practices acquired | Clinic	2					2	2
Aggregate principal payment due in 2018						$ 5,317,000
Aggregate principal payment due in 2019						782,000
Notes Payable [Member] | 2017 Acquisition [Member]
Debt Instrument [Line Items]
Aggregate amount of notes payable						2,200,000
Aggregate principal payment due in 2018						1,300,000
Aggregate principal payment due in 2019						$ 900,000
Payment of debt		$ 250,000
Notes Payable [Member] | 2018 Acquisition [Member]
Debt Instrument [Line Items]
Aggregate amount of notes payable	$ 150,000
Average effective interest rate	4.50%
Minimum [Member]
Debt Instrument [Line Items]
Spread on Libor variable rate						1.25%
Spread on variable rate						0.10%
Percentage of unused commitment fee						0.25%
Minimum [Member] | Notes Payable [Member]
Debt Instrument [Line Items]
Average effective interest rate						3.25%
Maximum [Member]
Debt Instrument [Line Items]
Spread on Libor variable rate						2.00%
Spread on variable rate						1.00%
Percentage of unused commitment fee						0.30%
Maximum [Member] | Notes Payable [Member]
Debt Instrument [Line Items]
Average effective interest rate						4.00%
Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility commitment								$ 125,000,000
Revolving credit facility maturity date						Nov. 30, 2021
Remaining revolving credit outstanding						$ 83,000,000
Average effective interest rate						3.80%
Credit Agreement [Member]
Debt Instrument [Line Items]
Cash and noncash consideration with respect to acquisition after amendment					$ 50,000,000
Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Cash dividends after amendment			$ 20,000,000	$ 15,000,000	$ 10,000,000

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