Note 3 - Digital Assets - Summary of Crypto Asset Activities (Details) - Bittensor (TAO) Staking Rewards [Member] $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($)
Tokens purchased, tokens	543.96
Crypto purchases, fair value	$ 186

Amount of increase in crypto asset from purchase. Excludes crypto asset held for platform user.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476162/350-60-50-3

Name:	us-gaap_CryptoAssetPurchase
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration