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Note 6 - Intangible Assets and Goodwill - Summary of Intangible Assets (Details) - USD ($) | Mar. 31, 2017 | Mar. 31, 2016
--- | --- | ---
Intangible assets, gross | $ 2,842,302 | $ 1,210,000
Less accumulated amortization and impairment | (1,465,603) | (100,888)
Intangible assets, net | 1,376,699 | 1,109,112
Trade Names [Member] |  |
Intangible assets, gross | 442,000 | 120,000
Customer Relationships [Member] |  |
Intangible assets, gross | 751,000 |
Noncompete Agreements [Member] |  |
Intangible assets, gross | 69,700 |
Certification Marks [Member] |  |
Intangible assets, gross | 47,000 |
Patents [Member] |  |
Intangible assets, gross | 1,090,000 | 1,090,000
Computer Software, Intangible Asset [Member] |  |
Intangible assets, gross | 420,360 |
Other Intangible Assets [Member] |  |
Intangible assets, gross | $ 22,242 |

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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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