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Investments - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 07, 2017 | Jun. 27, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jan. 31, 2018 | Dec. 31, 2017
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Gain (loss) from equity method investment |  |  |  |  | $ (518) | $ (111) |  |
Investment |  | $ 950 |  |  |  | 950 |  |
Bi-PA |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity investment ownership position |  |  | 15.00% |  | 15.00% |  |  |
Cost-method Investments, Other than Temporary Impairment |  |  |  |  | $ 0 |  |  |
Profeng Australia, Pty Ltd |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Joint venture, consideration | $ 1,900 |  |  |  |  |  |  |
TyraTech Inc. |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity investment ownership position |  |  |  |  |  |  | 34.38% | 15.11%
Gain (loss) from equity method investment |  |  | $ (347) | $ (69) | $ (443) | (111) |  |
Hong Kong JV |  |  |  |  |  |  |  |
Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity investment ownership position |  |  | 50.00% |  | 50.00% |  |  |
Gain (loss) from equity method investment |  |  | $ 46 | $ 0 | $ (75) | $ 0 |  |

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