Note 1 - Organization and Significant Accounting Policies (Details Textual) - USD ($)					3 Months Ended				5 Months Ended		9 Months Ended	12 Months Ended
	Apr. 01, 2026	Oct. 27, 2025	Feb. 24, 2025	Mar. 07, 2023	Mar. 31, 2026		Oct. 31, 2025	Mar. 31, 2025	Mar. 31, 2026	Jul. 28, 2025	Feb. 28, 2025	Dec. 31, 2025
Stock Issued During Period, Shares, New Issues (in shares)					14,558,681							100,429,631
Stock Issued During Period, Value, New Issues					$ 107,767,000	[1]		$ 205,424,000				$ 741,423,000	[1]
Proceeds from Issuance of Common Stock					$ 107,767,000			$ 205,424,000
March 2023 Equity Distribution Agreement [Member]
Equity Agreement, Maximum Shares Issuable, Value				$ 250,000,000
June 2024 Equity Distribution Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)											30,513,253
Stock Issued During Period, Value, New Issues											$ 250,000,000
Proceeds from Issuance of Common Stock											$ 245,800,000
February 2025 Equity Distribution Agreement [Member]
Equity Agreement, Maximum Shares Issuable, Value			$ 350,000,000				$ 500,000,000
Stock Issued During Period, Shares, New Issues (in shares)							59,492,504
Stock Issued During Period, Value, New Issues							$ 445,100,000
Proceeds from Issuance of Common Stock							$ 438,000,000
Equity Agreement, Maximum Shares Issuable, Value, Increase (Decrease)										$ 150,000,000
October 2025 Equity Distribution Agreement [Member]
Equity Agreement, Maximum Shares Issuable, Value		$ 500,000,000
Stock Issued During Period, Shares, New Issues (in shares)					14,558,681				44,824,644
Stock Issued During Period, Value, New Issues					$ 109,500,000				$ 332,700,000
Proceeds from Issuance of Common Stock					$ 107,800,000				$ 327,500,000
October 2025 Equity Distribution Agreement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	4,000,000
Stock Issued During Period, Value, New Issues	$ 28,200,000
Proceeds from Issuance of Common Stock	$ 27,800,000

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