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Note 4 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Cash, Uninsured Amount | $ 249,000 |  | $ 134,000
Impairment of Intangible Assets, Finite-lived | 0 | $ 0 |
Goodwill, Impairment Loss |  |  | 1,300,000
Long-term Debt, Total | $ 9,261,713 |  | $ 9,251,547
Client Acquisition Costs [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 4 years |  | 4 years
Weighted Average [Member] |  |  |
Merchant Contracts, Term (Year) | 3 years |  |
Russia and Cayman Islands [Member] |  |  |
Cash, Uninsured Amount | $ 33,000 |  | $ 30,000

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