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Note 14 - Fair Value of Financial Instruments - Fair VAlue of Redeemable Non-controlling Interest and Acquisition Contingent Consideration Obligations (Details)
12 Months Ended
Mar. 31, 2018
USD ($)
Acquisition Contingent Consideration Obligations [Member]  
Beginning Balance $ 3,023,031
Payment of contingent consideration (1,100,000)
Interest accrued on contingent consideration 32,956
Ending Balance 1,955,987
Redeemable Noncontrolling Interest [Member]  
Beginning Balance 1,443,901
Capital contribution by non-controlling member 252,000
Net income attributable to non-controlling interests 254,938
Fair value adjustment 42,100
Ending Balance $ 1,992,939