Note 5 - Capital Stock - Summary of Warrants Activity (Details) - $ / shares	1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Dec. 31, 2024	Jun. 06, 2025	Jun. 04, 2025	Aug. 23, 2024
Common Warrants and 2023 Placement Agent Warrants [Member]
Warrants outstanding (in shares)	1,464,309	1,464,309	1,464,309		1,464,309
Exercise Price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41		$ 3.41
Warrants outstanding and exercisable (in shares)
Warrants outstanding and exercisable, exercise price (in dollars per share)
Warrants outstanding and exercisable (in shares)	1,464,309	1,464,309	1,464,309		1,464,309
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)	403,030	403,030	403,030		403,030
Exercise Price (in dollars per share)	$ 3.41	$ 3.41	$ 3.41		$ 3.41
Warrants outstanding and exercisable (in shares)
Warrants outstanding and exercisable, exercise price (in dollars per share)
Warrants outstanding and exercisable (in shares)	403,030	403,030	403,030		403,030
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)	4,056,201	4,056,201	4,056,201		4,056,201	2,272,203			2,401,047
Exercise Price (in dollars per share)	$ 1.78	$ 1.78	$ 1.78		$ 1.78	$ 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)					2,188,862	24,104
Granted, warrants, exercise price (in dollars per share)					$ 3.81	$ 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)			(394,864)	0	(404,864)	(282,314)
Exercised, warrants, exercise price (in dollars per share)			$ 3.41		$ 3.41	$ 3.41
Expired, warrants (in shares)						(26)
Expired, warrants, exercise price (in dollars per share)						$ 2,575.38
Warrants outstanding and exercisable (in shares)	4,056,201	4,056,201	4,056,201		4,056,201	2,272,203
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 1.78	$ 1.78	$ 1.78		$ 1.78	$ 3.41
Prefunded Warrants [Member]
Warrants outstanding (in shares)	1,989,392	1,989,392	1,989,392		1,989,392
Exercise Price (in dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001		$ 0.0001		$ 3.77
Warrants outstanding and exercisable (in shares)
Warrants outstanding and exercisable, exercise price (in dollars per share)
Exercised, warrants (in shares)	0
Warrants outstanding and exercisable (in shares)	1,989,392	1,989,392	1,989,392		1,989,392
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001		$ 0.0001
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
Warrants outstanding and exercisable (in shares)
Warrants outstanding and exercisable, exercise price (in dollars per share)	$ 3.77
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
Warrants outstanding and exercisable (in shares)
Warrants outstanding and exercisable, exercise price (in dollars per share)
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