Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted cash and cash equivalents	$ 1,165	$ 1,164
Capitalized Drilling Costs	17,600	11,200	$ 5,200
Foreign exchange gain (loss), net	$ (3,810)	$ 7,211	$ 417
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	14 years