Note 5 - Capital Stock (Details Textual)						7 Months Ended		8 Months Ended		12 Months Ended				24 Months Ended	36 Months Ended
		Jun. 06, 2025 USD ($) $ / shares shares	Jun. 04, 2025 USD ($) $ / shares shares	Aug. 23, 2024 USD ($) $ / shares shares	Mar. 30, 2023 $ / shares shares	Dec. 31, 2025 $ / shares shares		Dec. 31, 2025 $ / shares shares		Dec. 31, 2025 USD ($) $ / shares shares		Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2024 $ / shares shares	Dec. 31, 2025 $ / shares shares		Jun. 30, 2025	Jun. 05, 2025 $ / shares shares	Apr. 17, 2025 USD ($)	Mar. 31, 2025 $ / shares	Oct. 06, 2023 $ / shares	Mar. 31, 2023 $ / shares shares
Common Stock, Shares Authorized (in shares)						150,000,000		150,000,000		150,000,000		150,000,000		150,000,000	150,000,000
Common Stock, Shares, Issued (in shares)						3,327,399		3,327,399		3,327,399		1,144,926		1,144,926	3,327,399
Common Stock, Shares, Outstanding (in shares)						3,327,210		3,327,210		3,327,210		1,144,737		1,144,737	3,327,210
Dividends, Preferred Stock | $										$ 32,000		$ 89,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares						$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001	$ 0.0001
Warrant Adjustment, Deemed Dividend | $				$ 8,974,000						$ 0		$ 8,974,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.0001				$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001		$ 0.0001	$ 0.0001
Treasury Stock, Common, Shares (in shares)						189		189		189		189		189	189
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio				40
Warrants Post Reverse Split [Member]
Class of Warrant or Right, Outstanding (in shares)	[1]					127,531		127,531		127,531					127,531
Series F Preferred Stock [Member]
Conversion of Stock, Shares Converted (in shares)										970		3,033
Dividends, Preferred Stock | $										$ 32,000		$ 89,000
Stock Issued During Period, Shares, New Issues (in shares)										575		1,648
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares					$ 68.4	$ 3.77		$ 3.77		$ 3.77		$ 11.17		$ 11.17	$ 3.77						$ 3.77
Preferred Stock, Convertible, Floor Price (in dollars per share) | $ / shares																					$ 11.17
Private Placement [Member] | Series F Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)					6,550
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares					$ 0.0001
The 2025 Private Placement [Member]
Legal Fees | $			$ 50,000
Conversion of Series F Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)										257,617		288,968	352,624	641,592	899,209
Conversion of Stock, Shares Converted (in shares)										970		3,033
Dividends, Preferred Stock | $										$ 39,000		$ 191,000
Common Stock Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)										521,725		282,314
Class of Warrant or Right, Exercised (in shares)										521,725		282,314
Proceeds From Warrant Exercises, Net | $										$ 1,639,000		$ 903,000
Prefunded Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)										1,403,131
Class of Warrant or Right, Exercised (in shares)										1,403,131
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		1,989,392
Class of Warrant or Right, Cash Fee, Percentage of Proceeds			5.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 3.77				$ 3.77	[2]	$ 3.77	[2]	$ 3.77	[2]				$ 3.77	[2]
Warrants and Rights Outstanding, Term (Month)																	12 months
Class of Warrant or Right, Outstanding (in shares)						586,261		586,261		586,261					586,261
Proceeds From Warrant Exercises, Net | $		$ 6,888,000
Class of Warrant or Right, Cash Fee | $		375,000
Proceeds from Issuance of Warrants | $		7,500,000
Other Expenses | $		$ 237,000
Dividends per Warrant or Right (in dollars per share) | $ / shares		$ 3.7699
Class of Warrant or Right, Maximum Beneficial Ownership		4.99%
Class of Warrant or Right, Maximum Beneficial Ownership, Election of Holder		9.99%
Percent of Stock Ownership, Warrant Transaction Threshold for Shares		50.00%
Preferred Warrants [Member]
Class of Warrant or Right, Exercised (in shares)										575		1,648
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					32,750
Class of Warrant or Right, Cash Fee, Percentage of Proceeds										8.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 975		$ 975		$ 975		$ 975		$ 975	$ 975					$ 975
Warrants and Rights Outstanding, Term (Month)																				3 years
Class of Warrant or Right, Outstanding (in shares)						30,527		30,527		30,527					30,527
Proceeds from Warrant Exercises | $										$ 561,000		$ 1,607,000
Proceeds From Warrant Exercises, Net | $										516,000		1,478,000
Class of Warrant or Right, Cash Fee | $										45,000		$ 129,000
Investor Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					95,764
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					7,663																	103,427
Class of Warrant or Right, Cash Fee, Percentage of Proceeds					8.00%
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares																						$ 68.4
Class of Warrant or Right, Beneficial Ownership Percentage																						4.99%
Class of Warrant or Right, Outstanding (in shares)				153,470
Warrant Adjustment, Deemed Dividend | $										$ 539,000
Placement Agent Warrants [Member] | Warrants Post Reverse Split [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	[1]					$ 68.4		$ 68.4		$ 68.4					$ 68.4
Class of Warrant or Right, Outstanding (in shares)	[1]					7,663		7,663		7,663					7,663
Common Warrants Issued from Preferred Warrants [Member]
Class of Warrant or Right, Exercised (in shares)										521,725		282,314
Class of Warrant or Right, Cash Fee, Percentage of Proceeds										8.00%
Class of Warrant or Right, Issued (in shares)										152,519		24,104
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 3.41		$ 3.41		$ 3.41					$ 3.41
Warrants and Rights Outstanding, Term (Month)						5 years		5 years		5 years		5 years		5 years	5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares										$ 3.41		$ 3.41
Class of Warrant or Right, Outstanding (in shares)						1,749,527		1,749,527		1,749,527					1,749,527
Proceeds from Warrant Exercises | $										$ 1,781,000		$ 964,000
Proceeds From Warrant Exercises, Net | $										1,639,000		887,000
Class of Warrant or Right, Cash Fee | $										$ 142,000		$ 77,000
Common Warrants Issued from Preferred Warrants [Member] | Warrants Post Reverse Split [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares												$ 68.4		$ 68.4
Common Warrants [Member]
Class of Warrant or Right, Exercised (in shares)										1,924,856		282,314
Class of Warrant or Right, Issued (in shares)										2,341,381		24,104
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 3.57		$ 3.57		$ 3.57		$ 3.41	$ 69.03	$ 3.41	$ 3.57
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares				$ 3.41						$ 3.67		$ 3.41
Class of Warrant or Right, Outstanding (in shares)				2,401,047		2,688,728		2,688,728		2,688,728		2,272,203	103,453	2,272,203	2,688,728
The 2025 Placement Agent Warrants [Member]
Class of Warrant or Right, Exercised (in shares)						0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			99,470
Class of Warrant or Right, Cash Fee, Percentage of Proceeds										5.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 4.71			$ 4.71		$ 4.71		$ 4.71					$ 4.71
Class of Warrant or Right, Outstanding (in shares)						99,470		99,470		99,470					99,470
Class of Warrant or Right, Cash Fee | $										$ 375,000
Legal Fees | $										$ 50,000
Advisor Warrants [Member]
Class of Warrant or Right, Exercised (in shares)								0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)																		100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 3.77		$ 3.77		$ 3.77					$ 3.77			$ 3.77
Class of Warrant or Right, Outstanding (in shares)						100,000		100,000		100,000					100,000
Class of Warrant or Right, Vesting Percent																		8.33%
Class of Warrant or Right, Vesting During Period (in shares)								50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights, Paid on Issuance (in dollars per share) | $ / shares						$ 3.7699		$ 3.7699		$ 3.7699					$ 3.7699
Class of Warrant or Right, Exercise Price of Warrants or Rights, Paid on Exercise (in dollars per share) | $ / shares						$ 0.0001		$ 0.0001		$ 0.0001					$ 0.0001
Stock Repurchase Program [Member]
Share Repurchase Program, Authorized, Amount | $																			$ 500,000
Share Repurchase Program, Remaining Authorized, Amount | $																			$ 500,000

[1] Adjusted by the Reverse Split.

[2] The aggregate exercise price for the Pre-Funded Warrants is $3.77, of which $3.7699 was paid upon issuance of the warrants and $0.0001 payable upon exercise of the warrant. The exercise of these warrants will not result in material proceeds for the Company.