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Note 5 - Notes Receivable (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Oct. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2018 | Mar. 31, 2020 | Dec. 31, 2019
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] |  |  |  |  |  |  |
Receivable Commitment to Lend |  |  |  |  |  |  | $ 1,500,000
Payments to Acquire Notes Receivable |  |  |  |  | $ 550,000 |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  | 40.00%
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] | Loan Agreement, Six Percent, Maturing June 2021 [Member] |  |  |  |  |  |  |
Payments to Acquire Notes Receivable |  |  |  | $ 1,000,000 |  |  |
Notes Receivable, Stated Interest Rate |  |  |  | 6.00% |  |  |
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] | Loan Agreement, Six Percent, Maturing October 2021 [Member] |  |  |  |  |  |  |
Payments to Acquire Notes Receivable |  | $ 500,000 |  |  |  |  |
Notes Receivable, Stated Interest Rate |  | 6.00% |  |  |  |  |
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member] | Loan Agreement, Six Percent, Maturing January 2022 [Member] |  |  |  |  |  |  |
Payments to Acquire Notes Receivable | $ 1,000,000 |  |  |  |  |  |
Private Limited India Based Company in the FinTech Industry [Member] |  |  |  |  |  |  |
Receivable Commitment to Lend |  |  | $ 435,000 |  |  |  |
Payments to Acquire Notes Receivable |  |  | $ 235,000 |  |  |  |
Notes Receivable, Stated Interest Rate |  |  | 5.00% |  |  |  |
Private Limited India Based Company in the FinTech Industry [Member] | Maximum [Member] |  |  |  |  |  |  |
Notes Receivable, Conversion, Percentage |  |  | 10.00% |  |  |  |
Private Limited India Based Company in the FinTech Industry [Member] | Notes Receivable [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  |  |  |  |  | $ 259,000 |

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- Definition The percentage of ownership that the holder of a notes receivable is entitled to upon conversion. + References No definition available. + Details
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- Definition The stated interest rate of notes receivable. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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