Note 8 - Capital Stock - Issuance of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2025		Sep. 30, 2025		Jun. 30, 2025		Mar. 31, 2025		Dec. 31, 2024		Sep. 30, 2024		Jun. 30, 2024		Mar. 31, 2024		Dec. 31, 2025		Dec. 31, 2024		Dec. 31, 2023
Issuance of common stock pursuant to public offerings, net (in shares)	[1]																	100,429,631
Issuance of common stock pursuant to public offerings, net																		$ 741,423	[1],[2]	$ 259,328		$ 159,438
At the Market Offering Program [Member]
Price per share (in dollars per share)	[1],[3]	$ 7.24		$ 7.03		$ 7.01		$ 8.17	[4]	$ 7.86		$ 8.25		$ 8.4		$ 8.8		$ 7.24		$ 7.86
Issuance of common stock pursuant to public offerings, net (in shares)	[1]	33,738,722		21,664,659		19,884,204		25,142,046		4,533,067		13,314,022		11,990,383		1,490,075				31,327,547
Issuance of common stock pursuant to public offerings, net	[2]	$ 244,238	[1]	$ 152,345	[1]	$ 139,416	[1]	$ 205,424	[1]	$ 35,630	[4]	$ 109,891	[1]	$ 100,698	[1]	$ 13,109	[1]			$ 259,328	[1]

[1] The Company has entered into 13 equity distribution agreements, 12 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.

[4] As of December 31, 2025, 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.