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Debt Arrangements - Additional Information (Detail) € in Millions |  |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 14, 2019 USD ($) | Apr. 25, 2019 USD ($) | Mar. 13, 2018 USD ($) | Aug. 22, 2016 | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 EUR (€) | Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Increased borrowing capacity |  |  | $ 65,000,000 |  |  |  |  |
Extended debt instrument date |  |  | Jun. 30, 2021 | Jun. 30, 2019 |  |  |  |
Debt to earnings before Interest, Taxes and Depreciation ratio |  |  | 225.00% |  |  |  |  |
Line of credit utilized borrowing capacity |  |  |  |  | $ 32,100,000 |  |  |
Line of credit remaining borrowing capacity |  |  |  |  | 32,900,000 |  |  |
Proceeds from long-term debt |  |  |  |  | $ 70,730,000 | $ 57,488,000 |  |
U.S. [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate for Line of credit |  |  |  |  | 3.141% |  | 3.141% |
Asia Pacific [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Restricted cash used to secure bank debt |  |  |  |  | $ 300,000 |  |  | $ 300,000
LIBOR [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate of LIBOR plus |  |  | 1.125% |  |  |  |  |
LIBOR [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate of LIBOR plus |  |  | 1.50% |  |  |  |  |
Polish Subsidiary [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Borrowings |  |  |  |  | $ 4,700,000 |  |  |
Interest rate for Line of credit |  |  |  |  | 2.765% |  | 2.765% |
Polish Subsidiary [Member] | Warsaw Interbank Offer Rate [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate of LIBOR plus |  |  |  |  | 1.125% |  |  |
Expiration date |  |  |  |  | Jun. 30, 2021 |  |  |
Australian subsidiary [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Borrowings |  |  |  |  | $ 5,700,000 |  |  |
Expiration date |  |  |  |  | Jun. 30, 2021 |  |  |
Interest rate for Line of credit |  |  |  |  | 2.155% |  | 2.155% |
Austrian Subsidiary [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit utilized borrowing capacity |  |  |  |  | $ 1,100,000 |  | € 1.0 |
Expiration date |  |  |  |  | May 31, 2020 |  |  |
Austrian Subsidiary [Member] | Line Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  | $ 600,000 |  |  |
Interest rate |  |  |  |  | 1.40% |  | 1.40% |
Indonesian Subsidiary [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit utilized borrowing capacity |  |  |  |  | $ 7,700,000 |  |  |
Expiration date |  | Apr. 30, 2024 |  |  |  |  |  |
Proceeds from long-term debt |  | $ 8,000,000 |  |  |  |  |  |
Interest rate |  | 3.501% |  |  |  |  |  |
Outstanding letters of credit, current |  |  |  |  | 800,000 |  |  |
New Zealand Subsidiary {Member} |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit utilized borrowing capacity |  |  |  |  | 5,200,000 |  |  |
Expiration date | Aug. 26, 2021 |  |  |  |  |  |  |
Proceeds from long-term debt | $ 5,300,000 |  |  |  |  |  |  |
Interest rate | 3.90% |  |  |  |  |  |  |
Outstanding letters of credit, current |  |  |  |  | $ 500,000 |  |  |

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