Note 18 - Other Stockholders' Equity (Details Textual)			1 Months Ended							3 Months Ended			7 Months Ended	12 Months Ended			13 Months Ended	18 Months Ended
	Jun. 05, 2020 USD ($)	Apr. 01, 2020 USD ($) shares	Jun. 30, 2021 USD ($) $ / shares shares	Jan. 31, 2021 USD ($) $ / shares shares	Nov. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($)	Apr. 30, 2020 USD ($) shares	Feb. 29, 2020 USD ($) shares	Jan. 31, 2020 USD ($) $ / shares	Mar. 25, 2022 shares	Dec. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares 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	Sep. 30, 2021 USD ($)	Dec. 31, 2019 shares	Jun. 08, 2018 shares	Apr. 10, 2009 shares
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	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	$ 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			$ 1.75
Class of Warrant or Right, Outstanding (in shares) | shares											128,572		128,572	128,572	195,160	195,160	128,572
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)														4 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)														3 years
Share-based Payment Arrangement, Expense														$ 0	$ 0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total											$ 0		$ 0	$ 0	$ 0	$ 0	$ 0
Class of Warrant or Right, Granted in Period (in shares) | shares														128,572	792,660
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares											$ 1.75		$ 1.75	$ 1.75	$ 1.00	$ 1.00	$ 1.75
Class of Warrant or Right, Exercised During Period (in shares) | shares														195,160	597,500
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares															391,308
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate															0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares) | shares											0		0	0	0	0	0			471,144
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value											$ 0		$ 0	$ 0	$ 0	$ 0	$ 0
Class of Warrant or Right, Outstanding, Intrinsic Value											$ 230,000		$ 230,000	$ 230,000	$ 140,615	$ 140,615	$ 230,000
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input											0.30		0.30	0.30	0.30	0.30	0.30
Warrants and Rights Outstanding, Measurement Input											0.30		0.30	0.30	0.30	0.30	0.30
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input															5	5
Warrants and Rights Outstanding, Measurement Input															5	5
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input															1.65	1.65
Warrants and Rights Outstanding, Measurement Input															1.65	1.65
Stock Incentive Plan 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares																						510,000
Stock Incentive Plan 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares																					300,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) | shares											0		0	0	0	0	0
Restricted Stock [Member] | Former Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) | shares															15,000
Restricted Stock [Member] | Chief Executive Officer [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) | shares										25,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares										250,000
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			$ 1.75
Percentage of Variable Price on VWAP											85.00%		85.00%	85.00%			85.00%
Class of Warrant or Right, Outstanding (in shares) | shares											230,000		230,000	230,000			230,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 1.75															$ 1.75
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares			128,572
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, Granted in Period (in shares) | shares															792,660
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
Class of Warrant or Right, Exercised During Period (in shares) | shares															597,500
Series D Preferred Stock Warrants [Member]
Class of Warrant Or Right, Issued In Period (in shares) | shares													128,572
Series D Preferred Stock Warrants [Member] | Maximum [Member]
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares											$ 1.75		$ 1.75	$ 1.75			$ 1.75
Percentage of Variable Price on VWAP											85.00%		85.00%	85.00%			85.00%
2021 Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input											5		5	5	5	5	5
Warrants and Rights Outstanding, Measurement Input											5		5	5	5	5	5
LF International Pte [Member]
Stock Issued During Period, Shares, Issued for Services (in shares) | shares															400,000
Garden State Securities [Member]
Stock Issued During Period, Shares, Issued for Services (in shares) | shares															200,000
Conversion from Series A Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Converted (in shares) | shares															90,860
Conversion of Stock, Shares Issued (in shares) | shares														0	941,388
Conversion of Accounts Receivable Owed to Investor into Series A Preferred Stock [Member]
Debt Conversion, Converted Instrument, Amount		$ 482,000
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares		48,200
Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares															42,660
Stock Issued During Period, Shares, New Issues (in shares) | shares															42,660
Stock Issued During Period, Value, New Issues															$ 426,600
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares															10	10
Preferred Stock, Dividend Rate, Percentage															8.00%	8.00%
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares															$ 10	$ 10
Accrued Deemed Dividends														$ 400,000	$ 380,000
Preferred Stock Redemption Premium	$ 2,500,000															$ 2,500,000
Preferred Stock, Value, Issued, Ending Balance											$ 3,154,583		$ 3,154,583	3,154,583	2,754,583	2,754,583	$ 3,154,583
Dividends Payable											400,000		400,000	400,000	380,000	380,000	400,000
Series B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares					170,000
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%
Accrued Deemed Dividends														(33,611)	(13,600)
Beneficial Conversion Feature of Preferred Stock															1,500,000
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	1,714,707	0	0	1,714,707
Dividends Payable											150,000		150,000	150,000			150,000
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, 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	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			$ 10
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares											$ 1.00		$ 1.00	$ 1.00			$ 1.00
Preferred Stock, Value, Issued, Ending Balance											$ 1,511,711		$ 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
Series D Preferred Stock [Member] | Unrelated Third Party [Member]
Proceeds from Issuance of Convertible Preferred Stock			$ 1,500,000
Series A Preferred Stock Warrants [Member]
Class of Warrant or Right, Exercised During Period (in shares) | shares				195,160
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares				103,104
Preferred Stock [Member] | Series A Preferred Stock [Member]
Accrued Deemed Dividends														$ 400,000	379,655
Beneficial Conversion Feature of Preferred Stock															(2,468,473)
Preferred Stock [Member] | Series B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Value, New Issues														$ 1,612,707
Accrued Deemed Dividends														$ 102,000
Preferred Stock [Member] | Series C Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Value, New Issues														$ 1,500,000
Accrued Deemed Dividends														$ 130,333
Preferred Stock [Member] | Series D Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Shares, New Issues (in shares) | shares														170,000
Stock Issued During Period, Value, New Issues														$ 1,500,000
Common Stock [Member]
Stock Issued During Period, Value, New Issues															$ 15,000
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares														103,104	391,308
Additional Paid-in Capital [Member]
Adjustments to Additional Paid in Capital, Preferred Stock with Beneficial Conversion Feature														$ 1,500,000
Additional Paid-in Capital [Member] | Series A Preferred Stock [Member]
Accrued Deemed Dividends														(400,000)	$ (379,655)
Beneficial Conversion Feature of Preferred Stock	$ 2,500,000														2,468,473
Additional Paid-in Capital [Member] | Series B Preferred Stock [Member]
Accrued Deemed Dividends														(135,611)	(13,600)
Beneficial Conversion Feature of Preferred Stock															1,500,000
Additional Paid-in Capital [Member] | Series C Preferred Stock [Member]
Accrued Deemed Dividends														$ (130,333)
Equity Financing Arrangement [Member]
Proceeds from Issuance or Sale of Equity, Total															$ 5,000,000
Equity Financing Arrangement [Member] | LF International Pte [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares									$ 1
Proceeds from Issuance of Convertible Preferred Stock						$ 500,000	$ 1,300,000	$ 700,000	$ 2,500,000
Equity Financing Arrangement [Member] | Series A Preferred Stock [Member]
Stock Issued During Period, Value, New Issues																		$ 1,000,000
Equity Financing Arrangement [Member] | Preferred Stock [Member] | Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares															500,000
Stock Issued During Period, Shares, New Issues (in shares) | shares															500,000
Equity Financing Arrangement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares															400,000
Stock Issued During Period, Shares, New Issues (in shares) | shares															400,000
Equity Financing Arrangement [Member] | Common Stock [Member] | LF International Pte [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares							260,000	140,000
Stock Issued During Period, Shares, New Issues (in shares) | shares							260,000	140,000