Note 5 - Capital Stock - Summary of Warrants Activity (Details) - $ / shares	3 Months Ended	4 Months Ended	5 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024	Jun. 06, 2025	Jun. 05, 2025	Jun. 04, 2025	Aug. 23, 2024
Common Warrants and 2023 Placement Agent Warrants [Member]
Warrants outstanding (in shares)	1,359,519	1,359,519	1,359,519	1,359,519
Exercise Price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41
Warrants outstanding and exercisable (in shares)	1,359,519	1,359,519	1,359,519	1,359,519
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41
Common Warrants Issued on June 30, 2024 [Member]
Warrants outstanding (in shares)	390,959	390,959	390,959	390,959
Exercise Price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41
Warrants outstanding and exercisable (in shares)	390,959	390,959	390,959	390,959
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41
Common Warrants [Member]
Warrants outstanding (in shares)	2,808,728	2,808,728	2,808,728	2,808,728	2,272,203				2,401,047
Exercise Price (in dollars per share)	$ 3.56	$ 3.56	$ 3.56	$ 3.56	$ 3.41
Warrants outstanding and exercisable (in shares)				2,272,203	103,453
Warrants outstanding and exercisable, exercise price (in dollars per share)				$ 3.41	$ 69.03
Granted, warrants (in shares)				2,341,381	24,104
Granted, warrants, exercise price (in dollars per share)				$ 3.79	$ 68.4
Make Whole Provision, warrants (in shares)					2,426,986
Make Whole Provision, weighted average exercise price (in dollars per share)					$ 3.41
Exercised, warrants (in shares)				(1,804,856)	(282,314)
Exercised, warrants, exercise price (in dollars per share)				$ 3.67	$ 3.41
Expired, warrants (in shares)					(26)
Expired, warrants, exercise price (in dollars per share)					$ 2,575.38
Warrants outstanding and exercisable (in shares)	2,808,728	2,808,728	2,808,728	2,808,728	2,272,203
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.56	$ 3.56	$ 3.56	$ 3.56	$ 3.41
Prefunded Warrants [Member]
Warrants outstanding (in shares)	706,261	706,261	706,261	706,261
Exercise Price (in dollars per share)	$ 3.77	$ 3.77	$ 3.77	$ 3.77		$ 3.77
Exercised, warrants (in shares)	(1,283,131)			(1,283,131)
Warrants outstanding and exercisable (in shares)	706,261	706,261	706,261	706,261
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.77	$ 3.77	$ 3.77	$ 3.77
Advisor Warrants [Member]
Warrants outstanding (in shares)	100,000	100,000	100,000	100,000
Exercise Price (in dollars per share)	$ 3.77	$ 3.77	$ 3.77	$ 3.77			$ 3.77
Exercised, warrants (in shares)			0
Warrants outstanding and exercisable (in shares)	100,000	100,000	100,000	100,000
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.77	$ 3.77	$ 3.77	$ 3.77
The 2025 Placement Agent Warrants [Member]
Warrants outstanding (in shares)	99,470	99,470	99,470	99,470
Exercise Price (in dollars per share)	$ 4.71	$ 4.71	$ 4.71	$ 4.71				$ 4.7125
Exercised, warrants (in shares)		0
Warrants outstanding and exercisable (in shares)	99,470	99,470	99,470	99,470
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 4.71	$ 4.71	$ 4.71	$ 4.71
Q3 2025 Common Warrants [Member]
Warrants outstanding (in shares)	152,519	152,519	152,519	152,519
Exercise Price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41
Warrants outstanding and exercisable (in shares)	152,519	152,519	152,519	152,519
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41	$ 3.41