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Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 08, 2016	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees options granted		0				0
Number of shares vested						19,313	24,312
Number of shares expected to vest		19,760		3,900		19,760	3,900
Stock-based compensation		$ 1,469		$ 1,242		$ 2,778	$ 2,322
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest		77,598				77,598		77,598
Number of Shares, Granted						0	0
Targeted performance percentage								200.00%
Target performance percentage to meet performance measure based on net sales								175.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested		20,313	8,800	188,400	10,100
Weighted Average Grant-Date Fair Value, Granted		$ 23.66	$ 19.97	$ 17.08	$ 16.10
Stock-based compensation		$ 988		$ 777		$ 1,750	$ 1,433
Unamortized Stock-Based Compensation		$ 7,424		$ 5,198		$ 7,424	$ 5,198
Remaining Weighted Average Period (years)		2 years 2 months 12 days		1 year 4 months 24 days		2 years 2 months 12 days	1 year 4 months 24 days
Number of Shares, Granted		22,308	254,972	38,502	251,475
Unvested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized Stock-Based Compensation		$ 7,424				$ 7,424
Remaining Weighted Average Period (years)						2 years 2 months 12 days
Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested			14,625	48,046
Weighted Average Grant-Date Fair Value, Granted	$ 15.43	$ 22.69	$ 18.79	$ 15.88	$ 15.40	$ 18.91
Stock-based compensation		$ 481		$ 321		$ 1,028	$ 621
Unamortized Stock-Based Compensation		$ 3,336		$ 2,157		$ 3,336	$ 2,157
Remaining Weighted Average Period (years)		2 years 2 months 12 days		2 years 3 months 18 days		2 years 2 months 12 days	2 years 3 months 18 days
Number of Shares, Granted		3,850	122,446	7,400	121,194	126,296	128,594
Targeted performance percentage		200.00%		200.00%		200.00%	200.00%
Unvested Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized Stock-Based Compensation		$ 3,336				$ 3,336
Remaining Weighted Average Period (years)						2 years 2 months 12 days
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued by equity investee						277,280	289,977
Weighted Average Grant-Date Fair Value, Granted						$ 20.27	$ 16.23
Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest				1,000			1,000
Number of days of service before cliff vesting							1 year
Share-based Compensation Award, Tranche One | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting						178 days
Share-based Compensation Award, Tranche One | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting						1060 days
After Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting						3 years	3 years
After Two Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest				2,500			2,500
Number of days of service before cliff vesting							2 years
Vested on March 9, 2021 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff vesting date						Mar. 09, 2021	Feb. 08, 2020
Performance based stock options based upon financial performance of earnings before interest and tax ("EBIT") and net sales goal for the period commencing January 1, 2017 through December 31, 2019 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance						80.00%
Earnings before income taxes goal weight, percentage						50.00%
Net sales goal weight, percentage						30.00%
Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2017 through December 31, 2019 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income taxes goal weight, percentage						20.00%
Performance based stock options based upon financial performance of earnings before interest and tax ("EBIT") and net sales goal for the period commencing January 1, 2016 and ending December 31, 2018 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance							80.00%
Earnings before income taxes goal weight, percentage							50.00%
Net sales goal weight, percentage							30.00%
Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2016 and ending December 31, 2018 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income taxes goal weight, percentage							20.00%
Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, Commencing January 1, 2017 and Ending December 31, 2019 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted						$ 18.88
Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation for the Period Commencing January 1, 2017 and Ending December 31, 2019 | Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted						$ 15.85

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Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vesting Date

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Share Based Compensation Arrangements Maximum Target

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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