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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, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Apr. 30, 2007 | Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity income from foreign joint ventures' operations |  |  |  |  |  |  |  |  | $ 530 | $ 740 |  |
Dividends received |  |  |  |  |  |  |  |  | 589 | 1,170 |  |
Net sales | $ 9,397 | $ 8,673 | $ 11,444 | $ 8,298 | $ 7,690 | $ 13,780 | $ 12,302 | $ 15,311 | 37,812 | 49,083 |  |
Foreign joint ventures' operations related expenses |  |  |  |  |  |  |  |  | $ 245 | 393 |  |
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 |  |  |  |  |  |  |  |  | $ 800 | 970 |  |
Dividends received |  |  |  |  |  |  |  |  | 590 | 1,030 |  |
BOMAY | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 110 | 190 |  |
Accounts receivable from foreign joint venture | $ 40 |  |  |  | 0 |  |  |  | $ 40 | 0 |  |
MIEFE |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage | 41.00% |  |  |  |  |  |  |  | 41.00% |  |  |
Equity income from foreign joint ventures' operations |  |  |  |  |  |  |  |  | $ (270) | (230) |  |
Dividends received |  |  |  |  |  |  |  |  | 0 | 140 |  |
MIEFE | Accrued in Accounts Payable and Other Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Remaining investment from joint venture | $ 270 |  |  |  |  |  |  |  | 270 |  |  |
MIEFE | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 50 |  |
Accounts receivable from foreign joint venture | $ 0 |  |  |  | $ 50 |  |  |  | $ 0 | $ 50 |  |

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