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Revenues - Summary of Net Revenues Disaggregated by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 63,401	$ 65,725
Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	45,517	46,625
Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,884	19,100
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	33,567	29,241
United States [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,970	22,292
United States [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,597	6,949
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,447	6,995
Europe [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,568	6,009
Europe [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	879	986
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue	23,032	28,011
Asia Pacific [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,656	17,111
Asia Pacific [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	9,376	10,900
All Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,355	1,478
All Other [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,323	1,213
All Other [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 32	$ 265

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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