Note 14 - Fair Value of Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value Measurements at March 31,
	2018		2017
Marketable securities (Level 1)	$	2,552,774	$	4,593,667
Interest rate swaps (Level 2)	$	66,706	$	-
Acquisition contingent consideration obligations (Level 3)	$	1,955,987	$	3,023,031
Redeemable Non-Controlling Interest (Level 3)	$	1,992,939	$	1,443,901

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Acquisition Contingent Consideration Obligations			Redeemable Non-Controlling Interest
Beginning Balance	$	3,023,031		$	1,443,901
Payment of contingent consideration		(1,100,000	)		-
Capital contribution by non-controlling member		-			252,000
Net income attributable to non-controlling interests		-			254,938
Fair value adjustment		-			42,100
Interest accrued on contingent consideration		32,956			-
	$	1,955,987		$	1,992,939