Note 1 - Organization (Details Textual) $ in Thousands					1 Months Ended	3 Months Ended				9 Months Ended
	Oct. 26, 2026 USD ($) shares	Oct. 13, 2026 shares	Feb. 20, 2026	Jan. 16, 2026 USD ($) shares	Oct. 26, 2026 USD ($) shares	Sep. 30, 2026 USD ($) shares	Jun. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2026 USD ($) shares	Sep. 30, 2025 USD ($)	Dec. 31, 2025
Stock Issued In Connection with Exercise of Warrants, Value							$ 24,423	$ 237	$ 614
Proceeds from Issuance of Warrants										$ 25,001	$ 0
Digital Assets Received in Exchange for Pre-Funded Warrants										$ 109,031	$ 0
Crypto Asset, Number of Units						2,321,079,862				2,321,079,862		0
Number of Reportable Segments						1
Number of Operating Segments						1
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio			5							5
SKY Tokens and Stablecoins [Member]
Digital Assets Received in Exchange for Pre-Funded Warrants				$ 109,000
SKY Tokens [Member]
Crypto Asset, Number of Units						2,321,079,862				2,321,079,862
Crypto Asset, Percent of Total Supply						10.00%				10.00%
January 2026 Private Placement [Member]
Proceeds from Issuance of Warrants				$ 25,000
At the Market Offering Agreement [Member]
Common Stock Available for Issuance						$ 83,200				$ 83,200
Stock Issued During Period, Shares, New Issues | shares						1,160,636				3,854,399
Common Stock Available for Issuance						$ 1,300				$ 16,500
At the Market Offering Agreement [Member] | Subsequent Event [Member]
Common Stock Available for Issuance	$ 45,900				$ 45,900
Stock Issued During Period, Shares, New Issues | shares	15,801,547				15,801,547
Common Stock Available for Issuance	$ 36,400
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
The January 2026 Warrants [Member] | Subsequent Event [Member]
Stock Issued In Connection with Exercise of Warrants, Shares | shares		5,743,762