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Note 6 - Valuation Accounts - Summary of Valuation and Allowance Accounts (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Balance, Beginning of Year | $ 506,153 |
Balance, End of Year | 515,199 | $ 506,153
SEC Schedule, 12-09, Allowance, Credit Loss [Member] |  |
Balance, Beginning of Year | 123,165 | 55,212
Net Charged to Costs and Expenses | 96,000 | 89,613
Transfers |  |
Net Write-off | (13,643) | (21,660)
Balance, End of Year | 205,522 | 123,165
SEC Schedule, 12-09, Reserve, Legal [Member] |  |
Balance, Beginning of Year | 506,153 | 374,153
Net Charged to Costs and Expenses | 132,000 | 132,000
Transfers |  |
Net Write-off | (122,954) |
Balance, End of Year | $ 515,199 | $ 506,153

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Total of the transfers in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability. + References No definition available. + Details
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