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Acquisitions - Additional Information (Detail) |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 17, 2020 USD ($) | Mar. 13, 2020 USD ($) | Dec. 17, 2019 USD ($) | Mar. 26, 2018 USD ($) ft² T | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Paid from cash on hand |  |  |  |  |  | $ 13,519,000 | $ 9,000,000 | $ 22,852,000
Paid from cash on hand, assets acquired |  |  |  |  |  | 2,040,000 |  |
Goodwill | $ 27,972,000 |  |  |  |  | 27,972,000 | 26,086,000 | 22,954,000
Surfactants Segment [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | 22,070,000 |  |  |  |  | $ 22,070,000 | $ 20,197,000 | $ 17,054,000
Clariant (Mexico) [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase price |  | $ 14,000,000 |  |  |  |  |  |
Paid from cash on hand | 13,519,000 |  |  |  |  |  |  |
Payment of VAT | $ 308,000 |  |  |  |  |  |  |
Goodwill |  | 4,225,000 |  |  |  |  |  |
Clariant (Mexico) [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] | Trademarks and Know-how [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets identified related to acquisition |  | $ 1,300,000 |  |  |  |  |  |
Logos Technologies Asset Acquisition [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Paid from cash on hand, assets acquired |  |  | $ 2,040,000 |  |  |  |  |
Logos Technologies Asset Acquisition [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] | Laboratory Equipment [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Equipment acquired |  |  | 184,000 |  |  |  |  |
Logos Technologies Asset Acquisition [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] | Trademarks and Know-how [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  |  | 1,392,000 |  |  |  |  |
Logos Technologies Asset Acquisition [Member] | Surfactants Segment [Member] | 2020 Acquisitions [Member] | Patents [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  |  | $ 464,000 |  |  |  |  |
Oilfield Demulsifier Product Line [Member] | Surfactants Segment [Member] | 2019 Acquisition [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Paid from cash on hand |  |  |  | $ 9,000,000 |  |  |  |
Goodwill |  |  |  | $ 3,161,000 |  |  |  |
Weighted average amortization periods of identifiable intangibles assets |  |  |  | 20 years |  |  |  |
Oilfield Demulsifier Product Line [Member] | Surfactants Segment [Member] | 2019 Acquisition [Member] | Product Know-how [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets identified related to acquisition |  |  |  | $ 3,300,000 |  |  |  |
Oilfield Demulsifier Product Line [Member] | Surfactants Segment [Member] | 2019 Acquisition [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible assets identified related to acquisition |  |  |  | $ 1,900,000 |  |  |  |
BASF Mexicana, S.A. DE C.V. [Member] | Surfactants Segment [Member] | 2018 Acquisition [Member] | Ecatepec, Mexico [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Paid from cash on hand |  |  |  |  | $ 22,852,000 |  |  |
Intangible assets identified related to acquisition |  |  |  |  | $ 0 |  |  |
Capacity of production facility expected to be acquired | T |  |  |  |  | 50,000 |  |  |
Warehouse space, laboratory and office space currently expected to be acquired | ft² |  |  |  |  | 124,000 |  |  |

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