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Note 6 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill, Impairment Loss	$ 0	$ 0	$ 57,100	$ 0	$ 57,146
Sensitivity Analysis of Fair Value, Goodwill, Impairment Loss, Potential Increase (Decrease) on Basis Spread of Discount Rate					0.50%
Sensitivity Analysis of Fair Value, Goodwill, Impairment Loss, Impact of 50 Basis Points Adverse Change in Discount Rate					$ 4,300
Goodwill, Ending Balance	42,785			42,785		$ 42,785
Amortization of Intangible Assets, Total	1,200	900		3,400	3,500
Impairment of Intangible Assets, Finite-lived	0	$ 0		0	$ 4,708
Cementing Equipment [Member]
Goodwill, Ending Balance	24,100			24,100
Tubular Running Services [Member]
Goodwill, Ending Balance	$ 18,700			$ 18,700

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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