Disaggregated Revenue - Schedule of Disaggregates Revenue by Product Line (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue by product line	$ 43,099	$ 57,989	$ 90,557	$ 107,356
Environmental Technologies and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	7,186	8,201	14,557	15,100
Oilfield and Industrial Technologies and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	35,913	49,788	76,000	92,256
Oilfield and Industrial Technologies and Services | Technology Products and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	8,426	12,786	15,615	22,656
Oilfield and Industrial Technologies and Services | Industrial Products and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	3,141	3,269	7,868	6,562
Oilfield and Industrial Technologies and Services | Base Ceramic and Sand Proppants
Disaggregation Of Revenue [Line Items]
Revenue by product line	22,944	$ 33,733	49,609	$ 63,038
Oilfield and Industrial Technologies and Services | Sublease and Rental Income
Disaggregation Of Revenue [Line Items]
Revenue by product line	$ 1,402		$ 2,908