Disaggregated Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Disaggregation Of Revenue [Abstract]

Schedule of Disaggregates Revenue by Product Line

The following table disaggregates revenue by product line for the years ended December 31:

	2018		2017
Technology products and services	$	50,917	$	43,383
Industrial products and services		14,873		12,030
Base ceramic and sand proppants		112,819		110,144
Oilfield and Industrial Technologies and Services segment		178,609		165,557
Environmental Technologies and Services segment		32,136		23,199
	$	210,745	$	188,756