Annual report pursuant to Section 13 and 15(d)

Note 8 - Income Taxes - Tax Years Subject to Examination (Details)

v3.23.1
Note 8 - Income Taxes - Tax Years Subject to Examination (Details)
12 Months Ended
Dec. 31, 2022
Domestic Tax Authority [Member] | UNITED STATES | Minimum [Member]  
Jurisdiction 2014
Domestic Tax Authority [Member] | UNITED STATES | Maximum [Member]  
Jurisdiction 2022
Foreign Tax Authority [Member] | GABON | Minimum [Member]  
Jurisdiction 2018
Foreign Tax Authority [Member] | GABON | Maximum [Member]  
Jurisdiction 2022
Foreign Tax Authority [Member] | EGYPT | Minimum [Member]  
Jurisdiction 2017
Foreign Tax Authority [Member] | EGYPT | Maximum [Member]  
Jurisdiction 2022
Foreign Tax Authority [Member] | CANADA | Minimum [Member]  
Jurisdiction 2018
Foreign Tax Authority [Member] | CANADA | Maximum [Member]  
Jurisdiction 2022