Note 6 - Revenue - Revenue by Areas of Capability (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Total revenue	$ 339,279	$ 280,477
Well Construction [Member]
Total revenue	128,265	111,435
Well Management [Member]
Total revenue	$ 211,014	$ 169,042

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details