Note 2 - Digital Assets - Summary of Digital Assets (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Unrealized Loss on Fair Value Remeasurement	$ (1,517,000)		$ 0	$ (1,486,000)	$ 0
Staked TAO [Member]
Total tokens	21,811.63			21,811.63
Total cost	$ 8,096,000			$ 8,096,000
Crypto Asset, Fair Value	6,610,000			6,610,000
Unrealized gain				1,486,000
Balance	$ 6,610,000			$ 6,610,000
Bittensor (TAO) [Member]
Total tokens	21,822.03			21,822.03
Total cost	$ 8,099,000			$ 8,099,000
Crypto Asset, Fair Value	$ 6,613,000	$ 1,683,000		6,613,000
Unrealized gain		$ 31,000		1,486,000
Balance	5,031.28	0
Balance	$ 1,683,000	$ 0
Tokens purchased	16,516.91	5,024.71
Crypto purchases	$ 6,350,000	$ 1,650,000
Unrealized Loss on Fair Value Remeasurement	$ (1,517,000)			$ (1,486,000)
Balance	21,822.03	5,031.28		21,822.03
Balance	$ 6,613,000	$ 1,683,000		$ 6,613,000
Unstaked TAO [Member]
Total cost	3,000			3,000
Crypto Asset, Fair Value	3,000			3,000
Unrealized gain				0
Balance	3,000			3,000
Bittensor (TAO) Staking Rewards [Member]
Crypto Asset, Fair Value	$ 6,610,000			$ 6,610,000
Tokens purchased	273.84	6.57	0	280.41	0
Crypto purchases	$ 97,000	$ 2,000	$ 0	$ 99,000	$ 0
Balance	$ 6,610,000			$ 6,610,000