Note 5 - Capital Stock - Make Whole Provision Transactions (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Aug. 23, 2024
Warrants, deemed dividend		$ 0	$ 8,974,000	$ 0	$ 8,974,000	$ 8,974,000
Original Warrants [Member]
Warrants outstanding (in shares)		5,100,595		5,100,595
Aggregate Exercise Price		$ 8,722,000		$ 8,722,000
Warrants Post Reverse Split [Member]
Warrants outstanding (in shares)	[1]	127,531		127,531
Aggregate Exercise Price	[1]	$ 8,722,000		$ 8,722,000
Warrants Post Make Whole Provision [Member]
Warrants outstanding (in shares)	[2]	2,554,517		2,554,517
Warrants, deemed dividend				$ 8,974,000
Aggregate Exercise Price	[2]	$ 8,722,000		8,722,000
Warrants Issued on March 31, 2023 [Member]
Warrants, deemed dividend				$ 6,739,000
Warrants Issued on March 31, 2023 [Member] | Original Warrants [Member]
Warrants outstanding (in shares)		3,830,417		3,830,417
Warrants, exercise price (in dollars per share)	[3]	$ 1.71		$ 1.71
Warrants Issued on March 31, 2023 [Member] | Warrants Post Reverse Split [Member]
Warrants outstanding (in shares)	[1]	95,764		95,764
Warrants, exercise price (in dollars per share)	[1]	$ 68.4		$ 68.4
Warrants Issued on March 31, 2023 [Member] | Warrants Post Make Whole Provision [Member]
Warrants outstanding (in shares)	[2]	1,918,371		1,918,371
Warrants, exercise price (in dollars per share)	[4]	$ 3.41		$ 3.41
Warrants Issued in Q2 2024 [Member]
Warrants, deemed dividend				$ 1,696,000
Warrants Issued in Q2 2024 [Member] | Original Warrants [Member]
Warrants outstanding (in shares)		963,745		963,745
Warrants, exercise price (in dollars per share)	[3]	$ 1.71		$ 1.71
Warrants Issued in Q2 2024 [Member] | Warrants Post Reverse Split [Member]
Warrants outstanding (in shares)	[1]	24,104		24,104
Warrants, exercise price (in dollars per share)	[1]	$ 68.4		$ 68.4
Warrants Issued in Q2 2024 [Member] | Warrants Post Make Whole Provision [Member]
Warrants outstanding (in shares)	[2]	482,676		482,676
Warrants, exercise price (in dollars per share)	[4]	$ 3.41		$ 3.41
Placement Agent Warrants [Member]
Warrants outstanding (in shares)							153,470
Warrants, deemed dividend				$ 539,000
Placement Agent Warrants [Member] | Original Warrants [Member]
Warrants outstanding (in shares)		306,433		306,433
Warrants, exercise price (in dollars per share)	[3]	$ 1.71		$ 1.71
Placement Agent Warrants [Member] | Warrants Post Reverse Split [Member]
Warrants outstanding (in shares)	[1]	7,663		7,663
Warrants, exercise price (in dollars per share)	[1]	$ 68.4		$ 68.4
Placement Agent Warrants [Member] | Warrants Post Make Whole Provision [Member]
Warrants outstanding (in shares)	[2]	153,470		153,470
Warrants, exercise price (in dollars per share)	[4]	$ 3.41		$ 3.41

[1] Adjusted by the Reverse Split.

[2] Based on the original aggregate exercise price divided by the Make Whole Provision exercise price.

[3] Original exercise price based on the March 30, 2023 initial exercise price.

[4] Calculated by dividing (x) the sum of the dollar volume-weighted average price of the Company's Common Stock for each of the five lowest trading days during the sixteen trading days after the Reverse Split by (y) five.