Note 8 - Capital Commitments - Fair Value Assumptions (Details)	Jun. 30, 2026	Dec. 31, 2025
Measurement Input, Price Volatility [Member] \| CHESS Depositary Interests (CDIs) [Member]
Measurement input		1.041
Measurement Input, Price Volatility [Member] \| Options Held [Member]
Measurement input	0.521	0.592
Measurement Input, Risk Free Interest Rate [Member] \| CHESS Depositary Interests (CDIs) [Member]
Measurement input		0.04
Measurement Input, Risk Free Interest Rate [Member] \| Options Held [Member]
Measurement input	0.0455	0.0397
Measurement Input, Share Price [Member] \| CHESS Depositary Interests (CDIs) [Member]
Measurement input		0.57
Measurement Input, Share Price [Member] \| Options Held [Member]
Measurement input	1.2673	1.024
Measurement Input, Expected Dividend Rate [Member] \| Options Held [Member]
Measurement input	0	0
Measurement Input, Conversion Price [Member] \| Options Held [Member]
Measurement input	0.419	0.4083