Note 14 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Marketable Securities, Total	$ 7,861,000	$ 4,594,000
Fair Value, Inputs, Level 1 [Member]
Marketable Securities, Total	2,552,774	4,593,667
Fair Value, Inputs, Level 2 [Member]
Derivative Liability, Total	66,706
Fair Value, Inputs, Level 3 [Member]
Business Combination, Contingent Consideration, Liability, Total	1,955,987	3,023,031
Redeemable Non-Controlling Interest (Level 3)	$ 1,992,939	$ 1,443,901