Note 3 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025
SKY digital assets	$ 180,209	$ 0
Warrant liability	0		$ 0
Fair Value, Recurring [Member]
Restricted cash held as a certificate of deposit	154	267
SKY digital assets	180,209
Warrant liability		639,071
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Restricted cash held as a certificate of deposit	154	267
SKY digital assets	180,209
Warrant liability		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Restricted cash held as a certificate of deposit	0	0
SKY digital assets	0
Warrant liability		639,071
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Restricted cash held as a certificate of deposit	0	0
SKY digital assets	$ 0
Warrant liability		$ 0