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Summary of Company's Debt (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 109,227 | $ 144,669
Current portion | (3,485) | (3,460)
Long-term debt, less current maturities | $ 105,742 | 141,209
Revolving Note (U.S. Dollar Denominations) |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.38% |
Total debt | $ 94,000 | 129,000
DEG China Loan |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.25% |
Total debt | $ 1,477 | 1,919
DEG Vietnam Loan |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.21% |
Total debt | $ 13,750 | $ 13,750

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