Note 14 - Common Stock (Details Textual)					3 Months Ended			6 Months Ended
	Jun. 22, 2026 USD ($) shares	Mar. 31, 2025 USD ($) shares	Mar. 07, 2025 $ / shares	Feb. 11, 2025 USD ($) shares	Jun. 30, 2026 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) shares	Mar. 31, 2025 shares	Jun. 30, 2026 USD ($) $ / shares shares	Jun. 30, 2025 USD ($)	Feb. 28, 2026 $ / shares	Feb. 06, 2026 USD ($) $ / shares shares	Dec. 31, 2025 $ / shares shares	Dec. 09, 2025 $ / shares
Common Stock, Shares, Issued (in shares)					4,151,919			4,151,919				2,525,778
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.0001		$ 0.0001			$ 0.0001				$ 0.0001	$ 0.0001
Stock Issued During Period, Value, New Issues | $						$ 1,908,000
Proceeds from Issuance of Common Stock | $								$ 69,000	$ 1,908,000
Common Stock, Shares, Outstanding (in shares)					4,151,919			4,151,919				2,525,778
Prefunded Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares					$ 0.613			$ 0.613		$ 0.0001
Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)						260,258
Stock Issued During Period, Value, New Issues | $						$ 0
Stock Issued During Period, Shares, Exercise of Warrants (in shares)					437,012		7,524
Statera Securities Purchase Agreement [Member]
Proceeds from Issuance or Sale of Equity | $				$ 1,200,000
Statera Securities Purchase Agreement [Member] | Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)				360
Stock Issued During Period, Value, New Issues | $				$ 1,200,000
Statera Securities Purchase Agreement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)				55,635
Statera and Avenue Securities Purchase Agreement [Member]
Stock Issued During Period, Value, New Issues | $		$ 500,000
Statera and Avenue Securities Purchase Agreement [Member] | Series A Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)		131
Statera and Avenue Securities Purchase Agreement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)		55,704
Tumim Purchase Agreement [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares											$ 0.0001
Stock Issued During Period, Shares, New Issues (in shares)	129,000
Equity Issuable, Maximum Value | $					$ 49,900,000			$ 49,900,000			$ 50,000,000
Proceeds from Issuance of Common Stock | $	$ 69,000
Tumim Purchase Agreement [Member] | Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)											437,012
Warrants and Rights Outstanding | $											$ 375,000
Stock Issued During Period, Shares, Exercise of Warrants (in shares)						437,012
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares											$ 0.0001
Tumim Purchase Agreement [Member] | Prefunded Warrants [Member] | Minimum [Member]
Equity Issuable, Maximum Percent of Shares Ownable											4.99%
Tumim Purchase Agreement [Member] | Prefunded Warrants [Member] | Maximum [Member]
Equity Issuable, Maximum Percent of Shares Ownable											9.99%
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio			17