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Note 12 - Segment Reporting - Summary of Amortizable Intangible Assets by Geographic Region (Details) - USD ($) | Mar. 31, 2018 | Dec. 31, 2017
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Amortizable intangible assets | $ 43,322,522 | $ 45,651,912
CANADA |  |
Amortizable intangible assets | 7,414,822 | 7,748,940
UNITED STATES |  |
Amortizable intangible assets | 35,839,260 | 37,783,202
GERMANY |  |
Amortizable intangible assets | $ 68,440 | $ 119,770

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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