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Note 8 - Financing Activities (Details Textual)			3 Months Ended
	Jan. 16, 2026 USD ($) $ / shares shares	Oct. 16, 2025 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) $ / shares shares	Mar. 31, 2025 USD ($)	Jan. 20, 2026 USD ($)	Dec. 31, 2025 USD ($)	Oct. 31, 2025 $ / shares shares	Oct. 15, 2025 $ / shares
Stock Issued In Connection with Exercise of Warrants, Value				$ 614,000
Proceeds from Issuance of Warrants			$ 25,001,000	$ 0
Crypto Asset, Fair Value			$ 160,086			$ 0
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares			$ 0.06
USDT Tokens [Member]
Crypto Asset, Number of Units, Acquired	35,000,000
USDS Tokens [Member]
Crypto Asset, Number of Units, Acquired	16,000,000
USDT and USDS Tokens [Member]
Crypto Asset, Fair Value	$ 51,000,000
January 2026 SKY Tokens [Member]
Crypto Asset, Number of Units, Acquired	943,599,689
Crypto Asset, Fair Value	$ 58,000,000
The January 2026 Warrants [Member]
Stock Issued In Connection with Exercise of Warrants, Shares | shares	167,539,227
Stock Issued In Connection with Exercise of Warrants, Value	$ 134,000,000
Class of Warrant or Right, Purchase Price of Warrants or Rights | $ / shares	$ 0.8
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.05		0.05
Warrants Exercisable at Six Months, Percentage	20.00%
Warrants Exercisable at Ninth Months, Percentage	30.00%
Warrants Exercisable at Twelve Months, Percentage	50.00%
October 2025 Pre-Funded Warrants [Member]
Stock Issued In Connection with Exercise of Warrants, Shares | shares		1,081,082
Stock Issued In Connection with Exercise of Warrants, Value		$ 5,900,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 5.5	$ 0.002385				$ 0.002385	$ 0.05
Maximum Percentage of Common Stock Outstanding		9.90%
Percent of Closing Price		110.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares							22,664,040
At the Market Offering Agreement [Member]
Equity Issuable, Maximum Offering Price					$ 100,000,000
Comission, Percent					2.00%
Stock Issued During Period, Shares, New Issues | shares			1,434,919
Proceeds from Issuance or Sale of Equity			$ 13,700,000
Proceeds from Issuance or Sale of Equity, Net			13,400,000
Payments of Stock Issuance Costs			300,000
Common Stock Available for Issuance			$ 86,300,000
January 2026 Private Placement [Member]
Proceeds from Issuance of Warrants	$ 25,000,000
Maximum Percentage of Common Stock Outstanding	4.99%
January 2026 Private Placement [Member] | Election of the holder prior to the date of issuance [Member]
Maximum Percentage of Common Stock Outstanding	9.99%

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