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Note 9 - Segment Reporting (Details Textual)	3 Months Ended
Note 9 - Segment Reporting (Details Textual)	Mar. 31, 2026	Mar. 31, 2025
Number of Operating Segments	3
Number of Reportable Segments	3	2
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| Billed in Foreign Currency [Member]
Concentration Risk, Percentage	1.00%	1.00%
Product Concentration Risk [Member] \| Revenue Benchmark [Member] \| Staking Rewards [Member] \| Digital Assets [Member]
Concentration Risk, Percentage	12.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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