Note 5 - Shareholders' Equity (Details Textual)			1 Months Ended				3 Months Ended		6 Months Ended	12 Months Ended			18 Months Ended
	Apr. 01, 2020 shares	Jan. 03, 2020 $ / shares shares	Jan. 31, 2022 shares	Jun. 30, 2021 USD ($)	Jan. 31, 2021 USD ($) $ / shares shares	Nov. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2020 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Advance from Investor, Current | $														$ 1,500,000
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares							$ 0
Class of Warrant or Right, Outstanding (in shares) | shares							128,000			128,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares							$ 1.75			$ 1.75
Class of Warrant or Right, Exercised During Period (in shares) | shares							(0)
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%
Restricted Stock [Member] | Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares			250,000
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, Nonvested, Number, Ending Balance (in shares) | shares			225,000
Restricted Stock [Member] | Chief Executive Officer [Member] | Trailing-twelve-month EBITDA Equals or Exceeds $1 Million [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) | shares			56,250
Restricted Stock [Member] | Chief Executive Officer [Member] | Common Shares Trade at or Above $5/share for Ten or More Consecutive Trading Days [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) | shares			56,250
Restricted Stock [Member] | Chief Executive Officer [Member] | Operating Cash Flow, Calculated Cumulatively From the Date of Employment, Equals or Exceeds $1.5 Million [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) | shares			56,250
Restricted Stock [Member] | Chief Executive Officer [Member] | Company is Able to Refinance Its Current Lender With a Traditional Lender [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) | shares			56,250
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] | 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
Warrants In Connection With Series D Preferred Stock [Member]
Warrants Issued to Purchase Common Stock (in shares) | shares										128,000
Class of Warrant Or Right, Issued In Period, Exercise Price (in dollars per share) | $ / shares										$ 1.75
Percentage of Variable Price on VWAP										85.00%
Class of Warrant or Right, Outstanding (in shares) | shares										230,000
Series A Preferred Stock Warrants [Member]
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, Exercise Price (in dollars per share) | $ / shares										$ 1.75
2021 Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input											5	5
Conversion of Accounts Receivable Owed to Investor to Preferred Stock [Member]
Debt Conversion, Converted Instrument, Amount | $													$ 478,000
Conversion of Accounts Receivable Owed to Investor into Series A Preferred Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares	48,200
Series A Preferred Stock [Member]
Preferred Stock Redemption Premium | $												$ 2,500,000
Preferred Stock, Dividend Rate, Percentage											8.00%
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares											$ 10
Dividends Payable, Current | $										$ 100,000
Preferred Stock, Value, Issued | $							$ 3,255,000			3,155,000
Series B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares						170,000
Stock Issued During Period, Value, New Issues | $								$ 1,613,000
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
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance | $						$ 1,500,000	1,500,000
Preferred Stock, Value, Issued | $							1,749,000			1,715,000
Dividends Payable | $							202,000
Preferred Stock, Accretion of Redemption Discount | $							47,000
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
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance | $							1,500,000
Preferred Stock, Value, Issued | $							1,664,000			1,630,000
Dividends Payable | $							$ 164,000
Adjustments to Additional Paid in Capital, Preferred Stock with Beneficial Conversion Feature | $								$ 1,500,000
Series D Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage							8.00%
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares							$ 10
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance | $							$ 1,500,000
Preferred Stock, Value, Issued | $							1,546,000			$ 1,512,000
Dividends Payable | $							46,000
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 B Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares								170,000
Stock Issued During Period, Value, New Issues | $								$ 1,613,000
Preferred Stock [Member] | Series C Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares								170,000
Stock Issued During Period, Value, New Issues | $								$ 1,500,000
Equity Financing Arrangement [Member]
Proceeds from Issuance or Sale of Equity, Total | $											$ 5,000,000
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
LF International Offering [Member] | Series A Preferred Stock [Member]
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares		10
Shares Issued, Price Per Share (in dollars per share) | $ / shares		$ 10.00
LF International Offering [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares									400,000
Additional Shares Offering [Member] | Series A Preferred Stock [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