Segment Reporting (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment										2
Revenue		$ 156,778	$ 173,200	$ 169,038	$ 169,194	$ 173,207	$ 182,146	$ 175,475	$ 170,018	$ 668,210	$ 700,846	$ 647,819
Segment operating income		21,055	$ 31,207	$ 28,008	$ 16,414	17,978	$ 34,879	$ 33,449	$ 32,316	96,684	118,622	109,968
Total assets (at end of period)		774,673				648,827				774,673	648,827	584,812
Capital expenditures										22,269	21,741	18,775
Depreciation and amortization										22,605	23,087	24,524
Reservoir Description [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue										420,897	413,082	415,220
Segment operating income										55,140	54,847	66,500
Total assets (at end of period)		343,405				315,503				343,405	315,503	320,569
Capital expenditures										10,439	12,829	10,406
Depreciation and amortization										15,109	16,747	17,972
Reservoir Description [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue										436	988	294
Production Enhancement [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue										247,313	287,764	232,599
Segment operating income										38,378	63,039	43,987
Total assets (at end of period)		279,769				270,832				279,769	270,832	206,389
Capital expenditures										11,253	8,222	6,819
Depreciation and amortization										5,645	4,271	4,435
Production Enhancement [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue										500	378	1,185
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Segment operating income	[1]									3,166	736	(519)
Total assets (at end of period)	[1]	$ 151,499				$ 62,492				151,499	62,492	57,854
Capital expenditures	[1]									577	690	1,550
Depreciation and amortization	[1]									1,851	2,069	2,117
Corporate and Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	[1]									$ (936)	$ (1,366)	$ (1,479)

[1] Corporate and other" represents those items that are not directly relating to a particular segment and eliminations.