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Note 13 - Segment and Geographic Distribution of Operations - Comparison of Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total assets	$ 1,188,930	$ 1,251,177	$ 1,251,177
Operating Segments [Member] | Americas [Member]
Total assets	317,305		338,649
Operating Segments [Member] | Middle East and Asia Pacific [Member]
Total assets	213,538		226,422
Operating Segments [Member] | Europe and Mediterranean [Member]
Total assets	303,649		302,214
Operating Segments [Member] | West Africa [Member]
Total assets	239,168		242,825
Corporate, Non-Segment [Member]
Total assets	$ 115,270		$ 141,067

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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