Note 6 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2016
Number of Reporting Units			3
Fair Value Inputs, Long-term Revenue Growth Rate			2.50%
Goodwill, Impairment Loss			$ 314,301,000	$ 384,968,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)						$ 6,000,000
Finite-Lived Intangible Assets, Net	$ 76,057,000		76,057,000
Impairment of Intangible Assets, Finite-lived			61,014,000	11,200,000
Amortization of Intangible Assets			10,789,000	14,500,000	$ 10,900,000
Goodwill				307,677,000	219,953,000
Wireline Lift Assets [Member]
Finite-Lived Intangible Assets, Net		$ 38,200,000
Impairment of Intangible Assets, Finite-lived		50,400,000
Artificial Lift Asset [Member]
Finite-Lived Intangible Assets, Net		0
Impairment of Intangible Assets, Finite-lived		$ 4,600,000
IPR&D [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	0		$ 0			$ 6,000,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 6,000,000
Completion Services [Member]
Fair Value Inputs, Discount Rate			14.50%
Price to Earnings Multiple	10.6		10.6
Goodwill Impairment Testing, Income Approach, Percentage	80.00%		80.00%
Goodwill Impairment Testing, Market Approach, Percentage	20.00%		20.00%
Goodwill, Impairment Loss			$ 8,000	340,464,000
Goodwill	$ 0		$ 0		200,149,000
Well Support Services [Member]
Fair Value Inputs, Discount Rate			14.00%
Price to Earnings Multiple	10.5		10.5
Goodwill, Impairment Loss			$ 314,293,000	39,785,000
Goodwill	$ 0		$ 0	307,677,000	15,085,000
Other Services [Member]
Fair Value Inputs, Discount Rate			16.00%
Price to Earnings Multiple	11		11
Goodwill Impairment Testing, Income Approach, Percentage	50.00%		50.00%
Goodwill Impairment Testing, Market Approach, Percentage	50.00%		50.00%
Goodwill, Impairment Loss				4,719,000
Goodwill	$ 0		$ 0		$ 4,719,000