Note 1 - Business Description and Significant Accounting Policies - Summary of Crypto Asset Activities (Details) - Bittensor (TAO) Staking Rewards [Member]	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 ($)
Tokens purchased	273.84	6.57	0	280.41	0
Crypto purchases	$ 97,000	$ 2,000	$ 0	$ 99,000	$ 0