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Advances to and Investments in Foreign Joint Ventures' Operations - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Apr. 30, 2007 | Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | $ 741 | $ 2,194 |  |
Dividends received |  |  |  |  |  |  |  |  | 1,170 | 2,522 |  |
Net sales | $ 7,690 | $ 13,780 | $ 12,302 | $ 15,311 | $ 13,693 | $ 14,283 | $ 13,430 | $ 15,848 | 49,083 | 57,254 |  |
Outstanding balance on note | $ 870 |  |  |  | 2,610 |  |  |  | 870 | 2,610 |  |
Foreign joint ventures' operations related expenses |  |  |  |  |  |  |  |  | $ 393 | 522 |  |
BOMAY |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage | 40.00% |  |  |  |  |  |  |  | 40.00% |  |  |
Investment in joint ventures |  |  |  |  |  |  |  |  |  |  | $ 1,000 | $ 1,000
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | $ 970 | 2,050 |  |
Dividends received |  |  |  |  |  |  |  |  | 1,030 | 1,040 |  |
BOMAY | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 190 | 130 |  |
Accounts receivable from foreign joint venture | $ 0 |  |  |  | 30 |  |  |  | $ 0 | 30 |  |
MIEFE |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage | 41.00% |  |  |  |  |  |  |  | 41.00% |  |  |
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | $ (230) | 140 |  |
Dividends received |  |  |  |  |  |  |  |  | 140 | 650 |  |
MIEFE | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 50 | 10 |  |
Accounts receivable from foreign joint venture | $ 50 |  |  |  | $ 0 |  |  |  | $ 50 | $ 0 |  |

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