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Note 17 - Convertible Redeemable Preferred Stock (Details Textual) |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 13 Months Ended | 18 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 05, 2020 USD ($) | Jan. 03, 2020 USD ($) $ / shares shares | Jun. 30, 2021 USD ($) $ / shares shares | Jan. 31, 2021 USD ($) $ / shares shares | Nov. 30, 2020 USD ($) $ / shares shares | Feb. 28, 2021 shares | Dec. 31, 2021 USD ($) $ / shares shares | Mar. 31, 2021 USD ($) | Jun. 30, 2020 shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Jun. 30, 2021 USD ($) $ / shares shares | Sep. 30, 2021 USD ($)
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  |  |  |  |  |  |  | $ 3,000,000 | $ 5,426,601 |  |  |  |
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance |  |  |  |  |  |  | $ 0 |  |  | 0 | 1,532,164 | $ 1,532,164 | $ 0 |  |
Adjustments to Additional Paid in Capital, Preferred Stock with Beneficial Conversion Feature |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  |  |  |  |  |  |  |  | 0 | 1,500,000 |  |  |  |
Advance from Investor, Current |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 1,500,000 | $ 1,500,000 | $ 0 |  | $ 1,500,000
Class of Warrant Or Right, Issued In Period (in shares) | shares |  |  |  |  |  |  |  |  |  | 128,572 |  |  |  |  |
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 1.75 |  |  | $ 1.75 |  |  | $ 1.75 |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  |  |  |  |  |  | 128,572 |  |  | 128,572 | 195,160 | 195,160 | 128,572 |  |
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 391,308 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 1.75 |  |  | $ 1.75 | $ 1.00 | $ 1.00 | $ 1.75 |  |
Dividends, Total |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |
Measurement Input, Price Volatility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 68 | 68 |  |  |
Measurement Input, Price Volatility [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 167 | 167 |  |  |
Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  | 0.30 |  |  | 0.30 | 0.30 | 0.30 | 0.30 |  |
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 42 | 42 |  |  |
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 1.65 | 1.65 |  |  |
Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 5 | 5 |  |  |
Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Warrants In Connection With Series D Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant Or Right, Issued In Period (in shares) | shares |  |  |  |  |  |  | 128,572 |  |  |  |  |  |  |  |
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 1.75 |  |  | $ 1.75 |  |  | $ 1.75 |  |
Percentage of Variable Price on VWAP |  |  |  |  |  |  | 85.00% |  |  | 85.00% |  |  | 85.00% |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  |  |  |  |  |  | 230,000 |  |  | 230,000 |  |  | 230,000 |  |
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares |  |  | 128,572 |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  | $ 1.75 |  |  |  |  |  |  |  |  |  |  | $ 1.75 |
Series A Preferred Stock Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant Or Right, Issued In Period (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 792,660 |  |  |  |
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 1 | $ 1 |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 792,660 | 792,660 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 1 | $ 1 |  |  |
Cashless Exchange Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  |  |  | 103,104 |  |  |  |  | 391,308 | 391,308 |  |  |
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares |  |  |  |  |  | 195,160 |  |  |  |  | 597,500 |  |  |  |
Conversion of Accounts Receivable Owed to Investor to Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 478,000 |
Equity Financing Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity, Total |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 42,660 |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 10 | 10 |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  |  | $ 426,600 |  |  |  |
Preferred Stock Redemption Premium | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  | $ 2,500,000 |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  |  |  |  |  | 8.00% | 8.00% |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 10 | $ 10 |  |  |
Dividends Payable, Current |  |  |  |  |  |  | $ 100,000 |  |  | $ 100,000 | $ 100,000 | $ 100,000 | $ 100,000 |  |
Dividends Payable |  |  |  |  |  |  | 400,000 |  |  | 400,000 | 380,000 | 380,000 | 400,000 |  |
Preferred Stock, Value, Issued, Ending Balance |  |  |  |  |  |  | 3,154,583 |  |  | 3,154,583 | 2,754,583 | 2,754,583 | 3,154,583 |  |
Series A Preferred Stock [Member] | Conversion of Accounts Receivable Owed to Investor to Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,200 |
Series A Preferred Stock [Member] | LF International Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  | $ 10.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity, Total |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] | Additional Shares Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  | $ 10.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] | Equity Financing Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |
Common Stock [Member] | LF International Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  | 170,000 |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  | 1,612,707 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |
Dividends Payable |  |  |  |  |  |  | 150,000 |  |  | 150,000 |  |  | 150,000 |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  |  | $ 10.00 |  |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares |  |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |  |
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
Preferred Stock, Value, Issued, Ending Balance |  |  |  |  | $ 1,500,000 |  | 1,714,707 |  |  | 1,714,707 | 0 | 0 | 1,714,707 |  |
Preferred Stock, Accretion of Redemption Discount |  |  |  |  |  |  |  |  |  | 46,707 |  |  | 64,707 |  |
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  | 170,000 |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  | $ 10.00 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Value, Issued, Ending Balance |  |  |  |  |  |  | $ 1,630,333 |  |  | 1,630,333 | 0 | 0 | $ 1,630,333 |  |
Adjustments to Additional Paid in Capital, Preferred Stock with Beneficial Conversion Feature |  |  |  | $ 1,500,000 |  |  |  | $ 1,500,000 |  |  |  |  |  |  |
Series D Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 10 |  |  | $ 10 |  |  | $ 10 |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 1.00 |  |  | $ 1.00 |  |  | $ 1.00 |  |
Preferred Stock, Value, Issued, Ending Balance |  |  |  |  |  |  | $ 1,511,711 |  |  | $ 1,511,711 | $ 0 | $ 0 | $ 1,511,711 |  |
Adjustments to Additional Paid in Capital, Preferred Stock with Beneficial Conversion Feature |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Beneficial Conversion Feature |  |  |  |  |  |  | $ 0.3 |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Unrelated Third Party [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |

X
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