Intangible and Other Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Intangible And Other Assets [Line Items]
Amortization expense for intangible assets	$ 889	$ 921
Estimated amortization expense for intangible assets for year one	602
Estimated amortization expense for intangible assets for year two	341
Estimated amortization expense for intangible assets for year three	324
Estimated amortization expense for intangible assets for year four	40
Estimated amortization expense for intangible assets for year five	0
Other assets	1,034	5,434
Russian Proppant
Intangible And Other Assets [Line Items]
Loss on sale of business	350	26,747
Russian Proppant | Receivable Related to Money Owed from Sale of Business
Intangible And Other Assets [Line Items]
Other assets		$ 4,000
Proceeds from settlement of receivable	3,650
Loss on sale of business	$ 350