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Note 8 - Subsequent Events (Details Textual) - USD ($)					12 Months Ended
	Mar. 11, 2024	Mar. 08, 2024	Jan. 02, 2024	Jan. 03, 2023	Dec. 31, 2023	[1]	Dec. 31, 2022
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)					$ 1.45		$ 4.43
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)					805,350		865,825
Executives and Key Personnel [Member]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)				$ 1.38
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				406,250
Director [Member]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)				$ 1.38
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				262,500
Director [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				1 year
Director [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				1 year
Consultant [Member]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)				$ 1.38
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				15,000
Consultant [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)				1 year
Subsequent Event [Member]
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 1.59
Subsequent Event [Member] | Senior Secured 2024 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		8.00%
Debt Instrument, Face Amount		$ 6,000,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)		$ 1.79
Debt Instrument, Interest Rate, Stated Percentage, Default		18.00%
Debt Instrument, Maturity Date		Mar. 08, 2027
Subsequent Event [Member] | Senior Secured 2024 Notes [Member] | Forecast [Member]
Proceeds from Issuance of Senior Long-Term Debt		$ 5,850,000
Subsequent Event [Member] | Executives and Key Personnel [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			387,500
Subsequent Event [Member] | Executives and Key Personnel [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Subsequent Event [Member] | Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			352,500
Subsequent Event [Member] | Director [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			1 year
Subsequent Event [Member] | Director [Member] | Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	212,709		141,510
Subsequent Event [Member] | Nonexecutive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			17,600
Subsequent Event [Member] | Nonexecutive Employees [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Subsequent Event [Member] | Consultant [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			15,000
Subsequent Event [Member] | Consultant [Member] | Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			1 year
[1] Represents the following stock options granted: • Annual share-based compensation awards on January 3, 2023, including: (a) 406,250 stock options with an exercise price of $1.38 per share granted to executives and key personnel, upon one year anniversary, or vesting annually in equal installments over four years, (b) 262,500 stock options with an exercise price of $1.38 per share granted to members of the Board of Directors, vesting upon one year anniversary, (c) 24,100 stock options with an exercise price of $1.38 per share granted to employees, vesting annually in equal installments over four years, and (d) 15,000 stock options with an exercise price of $1.38 per share granted to a consultant, vesting upon one year anniversary. • Throughout the year the following stock options were granted: (a) on May 30, 2023, 37,500 stock options with an exercise price of $2.23 per share granted to a consultant, vesting over two months from the grant date, (b) on September 15, 2023, 55,000 stock options with an exercise price of $1.75 per share granted to a consultant, vesting over a year and half from the grant date, and (c) on October 23, 2023, 5,000 stock options with an exercise price of $1.66 per share granted to an employee vesting annually in equal installments over four years.

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