Note 8 - Capital Stock - Issuance of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						12 Months Ended
		Mar. 31, 2025		Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024
Issuance of common stock pursuant to public offerings, net (in shares)	[1]	25,142,046						31,327,547
Issuance of common stock pursuant to public offerings, net		$ 205,424	[1],[2]				$ 13,109	$ 259,328	[1],[2]
At the Market Offering Program [Member]
Price per share (in dollars per share)	[1],[3]	$ 8.17		$ 7.86	$ 8.25	$ 8.4	$ 8.8	$ 7.86
Issuance of common stock pursuant to public offerings, net (in shares)	[1]	25,142,046		4,533,067	13,314,022	11,990,383	1,490,075
Issuance of common stock pursuant to public offerings, net	[1],[2]	$ 205,424		$ 35,630	$ 109,891	$ 100,698	$ 13,109

[1] As of December 31, 2024, the Company had entered into twelve equity distribution agreements, eleven of which have either been terminated because all shares were sold or were replaced with a subsequent agreement.

[2] Net proceeds are net of the underwriters’ discount, if applicable, and other offering costs.

[3] Weighted average price received per share is after deducting the underwriters’ discount, if applicable, and other offering costs.