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Investments in Foreign Joint Ventures - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Aug. 20, 2019
Schedule of Equity Method Investments [Line Items]
Net sales	$ 10,514,000	$ 8,001,000	$ 34,584,000	$ 26,566,000
Bomay
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	40.00%		40.00%
Affiliated Entity
Schedule of Equity Method Investments [Line Items]
Net sales			$ 0
Energia Superior
Schedule of Equity Method Investments [Line Items]
Ownership interest					50.00%

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