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Revenue - Summary of Net Revenues Disaggregated by Geography (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	$ 63,355	$ 74,196	$ 129,080	$ 139,465
Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	48,005	48,349	94,630	88,986
Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,350	25,847	34,450	50,479
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	31,055	26,419	60,296	52,042
United States [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,732	18,295	48,024	35,286
United States [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,323	8,124	12,272	16,756
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,016	6,152	15,011	11,525
Europe [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,374	4,877	12,383	9,602
Europe [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,642	1,275	2,628	1,923
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue	23,130	40,263	51,141	73,619
Asia Pacific [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,287	23,876	32,398	42,087
Asia Pacific [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,843	16,387	18,743	31,532
All Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,154	1,362	2,632	2,279
All Other [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	612	1,301	1,825	2,011
All Other [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 542	$ 61	$ 807	$ 268

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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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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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