Note 7 - Intangible Assets and Goodwill (Tables)

12 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	Year Ended March 31,
	2018			2017
Tradenames	$	442,000		$	442,000
Customer relationships		751,000			751,000
Non-compete		69,700			69,700
Certification		47,000			47,000
License		250,000			-
Patents		1,090,000			1,090,000
Software		429,128			420,360
Other		22,242			22,242
		3,101,070			2,842,302
Less accumulated amortization and impairment		(1,788,598	)		(1,465,603	)
Intangible assets, net	$	1,312,472		$	1,376,699

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

Year ending March 31,
2019	$	351,715
2020		214,129
2021		152,568
2022		125,573
2023		115,578
Thereafter		352,909
	$	1,312,472

Schedule of Goodwill [Table Text Block]

	Year Ended March 31,
	2018			2017
Goodwill, at original cost	$	4,793,013		$	4,793,013
Less accumulated impairment		(375,408	)		(375,408	)
Goodwill, net of impairment	$	4,417,605		$	4,417,605