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Business Segments, Geographic Data, Sales by Product Group and Major Customers - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) Customer | Dec. 31, 2015 USD ($) Customer
Segment Reporting Information [Line Items] |  |
Tools, dyes and molds | $ 22,841 | $ 18,435
Percentage of net sales accounted from customer description | No other customer accounted for more than 10% of the Company's total net sales. |
Number of major customers | Customer | 3 | 3
China |  |
Segment Reporting Information [Line Items] |  |
Tools, dyes and molds | $ 15,710 | $ 10,172
Net Accounts Receivable | Three Largest Customers | Customer Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percentage of net accounts receivable accounted for by three largest customers | 35.80% | 56.20%

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