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Note 6 - Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Mar. 31, 2017
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Year Ended March 31, |
|  | 2017 |  |  | 2016 |
Tradenames |  | $ | 442,000 |  |  | $ | 120,000 |
Customer relationships |  |  | 751,000 |  |  |  | - |
Non-compete |  |  | 69,700 |  |  |  | - |
Certification |  |  | 47,000 |  |  |  | - |
Patents |  |  | 1,090,000 |  |  |  | 1,090,000 |
Software |  |  | 420,360 |  |  |  | - |
Other |  |  | 22,242 |  |  |  | - |
|  |  | 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 |
Finite-lived Intangible Assets Amortization Expense [Table Text Block] |
Year ending March 31, |  |  |  |
2018 |  | $ | 350,146 |
2019 |  |  | 268,021 |
2020 |  |  | 162,840 |
2021 |  |  | 162,840 |
2022 |  |  | 101,422 |
Schedule of Goodwill [Table Text Block] |
|  | Year Ended March 31, |
|  | 2017 |  |  | 2016 |
Goodwill, at original cost |  | $ | 4,793,013 |  |  | $ | 375,408 |
|  |  | 4,793,013 |  |  |  | 375,408 |
Less accumulated impairment |  |  | (375,408 | ) |  |  | (100,000 | )
Goodwill, net of impairment |  | $ | 4,417,605 |  |  | $ | 275,408 |

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