Note 9 - Intangible Assets and Goodwill (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	March 31, 2019
	Gross		Accumulated			Net Book
	Carrying Amount		Amortization			Value
Tradenames	$	580,000		(319,913	)	$	260,087
Customer relationships		751,000		(194,270	)		556,730
Non-compete		69,700		(37,638	)		32,062
Certification		47,000		(25,380	)		21,620
License		250,000		(59,967	)		190,033
Patents		1,090,000		(1,090,000	)		-
Software		571,507		(428,309	)		143,198
Other		22,242		(715	)		21,527
Intangible assets		3,381,449		(2,156,192	)		1,225,257

	March 31, 2018
	Gross		Accumulated			Net Book
	Carrying Amount		Amortization			Value
Tradenames	$	442,000		(229,480	)	$	212,520
Customer relationships		751,000		(119,170	)		631,830
Non-compete		69,700		(23,698	)		46,002
Certification		47,000		(15,980	)		31,020
License		250,000		(18,058	)		231,942
Patents		1,090,000		(1,090,000	)		-
Software		429,128		(291,405	)		137,723
Other		22,242		(808	)		21,435
Intangible assets		3,101,070		(1,788,598	)		1,312,472

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

Year ending March 31,
2020	$	300,539
2021		280,126
2022		205,016
2023		156,470
2024		83,970
Thereafter		199,136
	$	1,225,257

Schedule of Goodwill [Table Text Block]

	Year Ended March 31,
	2019			2018
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