Note 4 - Capital Stock - Summary of Warrants Activity (Details) - $ / shares	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Warrants outstanding (in shares)	5,101,345	5,101,345
Warrants outstanding as of December 31, 2023 (in shares)	5,101,345	5,101,345
Warrants Issued on June 28, 2021 [Member]
Warrants outstanding (in shares)	750	750
Exercise Price (in dollars per share)	$ 66	$ 66
Warrants outstanding as of December 31, 2023 (in shares)	750	750
Warrants outstanding as of December 31, 2023 (in dollars per share)	$ 66	$ 66
Warrants Issued on March 31, 2023 [Member]
Warrants outstanding (in shares)	4,136,850	4,136,850
Exercise Price (in dollars per share)	$ 1.71	$ 1.71
Warrants outstanding as of December 31, 2023 (in shares)	4,136,850	4,136,850
Warrants outstanding as of December 31, 2023 (in dollars per share)	$ 1.71	$ 1.71
Common Warrants [Member]
Warrants outstanding (in shares)	5,101,345	5,101,345	4,137,850
Exercise Price (in dollars per share)	$ 1.71	$ 1.71	$ 1.73
Warrants outstanding as of December 31, 2022 (in shares)		4,137,850	343,099
Warrants outstanding as of December 31, 2022 (in dollars per share)		$ 1.73	$ 0
Granted, warrants (in shares)	963,745	963,745	4,543,626
Granted, warrants, exercise price (in dollars per share)		$ 1.71	$ 1.56
Exercised, warrants (in shares)			(746,027)
Exercised, warrants, exercise price (in dollars per share)			$ 0.78
Expired, warrants (in shares)		(250)	(2,848)
Expired, warrants, exercise price (in dollars per share)		$ 60	$ 70.25
Warrants outstanding as of December 31, 2023 (in shares)	5,101,345	5,101,345	4,137,850
Warrants outstanding as of December 31, 2023 (in dollars per share)	$ 1.71	$ 1.71	$ 1.73
Warrants Issued in Q2 2024 [Member]
Warrants outstanding (in shares)	963,745	963,745
Exercise Price (in dollars per share)	$ 1.71	$ 1.71
Warrants outstanding as of December 31, 2023 (in shares)	963,745	963,745
Warrants outstanding as of December 31, 2023 (in dollars per share)	$ 1.71	$ 1.71