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Equity Method Investments - Additional Information (Detail) - USD ($)				10 Months Ended	12 Months Ended
	Nov. 09, 2018	Jul. 07, 2017	Jun. 27, 2017	Nov. 08, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 02, 2016
Equity Method Investments [Line Items]
Gain (loss) from equity method investment					$ (389,000)	$ (49,000)	$ (353,000)
Investment			$ 950,000			950,000	3,283,000
Joint venture, consideration					27,283,000	92,555,000
Profeng Australia, Pty Ltd
Equity Method Investments [Line Items]
Joint venture, consideration		$ 1,900,000
TyraTech Inc.
Equity Method Investments [Line Items]
Gain (loss) from equity method investment	$ 1,463,000			$ (1,424,000)		$ (177,000)	$ (353,000)
Equity investment ownership position						15.11%	15.11%
Huifeng/AMVAC Innovation Co., Ltd.
Equity Method Investments [Line Items]
Equity investment ownership position								50.00%
Hong Kong JV
Equity Method Investments [Line Items]
Gain (loss) from equity method investment					$ (427,000)	$ 128,000	$ 0
Equity investment ownership position					50.00%	50.00%
Carrying value of equity investment					$ 722,000	$ 1,078,000

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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