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Note 11 - Contract Costs (Details Textual) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | [2] | Jan. 01, 2018 | Dec. 31, 2017 | [1]
Capitalized Contract Cost, Net, Total | $ 1,378,336 |  | $ 1,400,000 | $ 1,403,608
Increase (Decrease) in Capitalized Costs | 195,408 |  |  |
Capitalized Contract Cost, Amortization | 220,680 |  |  |
Change in Capitalized Contract Costs | 25,272 |  |  |
Capitalized Contract Cost, Impairment Loss | $ 0 |  |  |
Minimum [Member] |  |  |  |
Capitalized Contract Cost, Amortization Period | 2 years |  |  |
Maximum [Member] |  |  |  |
Capitalized Contract Cost, Amortization Period | 10 years |  |  |
[1] | The beginning balance consists entirely of a cumulative adjustment recorded on January 1st, 2018 as a result of the modified retrospective adoption of ASU 2014-09. See note 3 for additional information.
[2] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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