Note 2 - Digital Assets (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Crypto Asset, Unrealized Gain (Loss), Nonoperating	$ (1,517,000)	$ 0	$ (1,486,000)	$ 0
Bittensor (TAO) [Member]
Crypto Asset, Unrealized Gain (Loss), Nonoperating	$ (1,517,000)		$ (1,486,000)

Amount of unrealized gain (loss) from remeasurement of crypto asset, classified as nonoperating. 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 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476163/350-60-45-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration