Note 5 - Segment Information - Assets from Continuing Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2022		Dec. 31, 2021	[2]
Long-lived assets from continuing operations	$ 495,272	[1]	$ 94,324
Total assets from continuing operations	855,641	[3]	263,090
Operating Segments [Member] | Gabon Segment [Member]
Long-lived assets from continuing operations	213,204	[1]	84,156
Total assets from continuing operations	395,393	[3]	201,748
Operating Segments [Member] | Egypt [Member]
Long-lived assets from continuing operations	168,012	[1]	0
Total assets from continuing operations	293,640	[3]	0
Operating Segments [Member] | Canada [Member]
Long-lived assets from continuing operations	103,263	[1]	0
Total assets from continuing operations	110,071	[3]	0
Operating Segments [Member] | Equatorial Guinea Segment [Member]
Long-lived assets from continuing operations	10,000	[1]	10,000
Total assets from continuing operations	10,861	[3]	10,548
Corporate, Non-Segment [Member]
Long-lived assets from continuing operations	793	[1]	168
Total assets from continuing operations	$ 45,676	[3]	$ 50,794

[1] Includes assets acquired in the TransGlobe acquisition

[2] Includes assets acquired in the Sasol acquisition

[3] Includes assets acquired in the TransGlobe acquisition