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Investments in Foreign Joint Venture - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2007	Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items]
Net sales	$ 1,955,000	$ 2,075,000	$ 3,171,000	$ 3,951,000
Affiliated Entity
Schedule Of Equity Method Investments [Line Items]
Net sales			$ 0	$ 0
BOMAY
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	40.00%		40.00%
Investment in joint ventures					$ 1,000,000	$ 1,000,000

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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.

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