Disaggregated Revenue - Schedule of Disaggregates Revenue by Product Line (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue by product line	$ 43,505	$ 53,819	$ 134,062	$ 134,062	$ 161,175	$ 161,175
Environmental Technologies and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	6,231	9,224		20,788		24,325
Oilfield and Industrial Technologies and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	37,274	44,595		113,274		136,850
Oilfield and Industrial Technologies and Services | Technology Products and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	9,540	12,922		25,155		35,578
Oilfield and Industrial Technologies and Services | Industrial Products and Services
Disaggregation Of Revenue [Line Items]
Revenue by product line	4,046	4,153		11,914		10,714
Oilfield and Industrial Technologies and Services | Base Ceramic and Sand Proppants
Disaggregation Of Revenue [Line Items]
Revenue by product line	22,911	$ 27,520		72,521		$ 90,558
Oilfield and Industrial Technologies and Services | Sublease and Rental Income
Disaggregation Of Revenue [Line Items]
Revenue by product line	$ 777			$ 3,684