Additional stock based compensation expense.

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Earnings Before Income Tax Goal Weighted Percentage

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Market price performance measure targeted percentage.

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Net Sales Goal Weighted Percentage

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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 Arrangement By Share Payment Option Exercisable Maximum Period

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Share Based Compensation Arrangements Maximum Target

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Stock Option Exercise Price Minimum Percentage On Grant Date Fair Value Of Underlying Shares

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Stock Option Ownership Percentage Required For Exercise Price Of Fair Market Value

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation for stock options.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Percentage of vesting of share-based compensation awards.

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Number of new stock issued during the period.

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Equity Plan Awards - Additional Information (Detail) - USD ($)		12 Months Ended			36 Months Ended
	Jan. 06, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 5,805,000	$ 4,714,000	$ 3,167,000
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Exercise Price as Percentage of Fair Value of Common Stock		10.00%
Option exercise price as percentage of fair value of common stock		110.00%
Option Exercisable Maximum Period		10 years
Incentive Stock Option Plans, Options granted		0	0	0
Stock-based compensation		$ 0	$ 345,000	$ 354,000
Remaining Weighted Average Period (years)				1 year
Nonstatutory Stock Options (“NSSO”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Options granted					0
Common Stock Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 3,657,000	$ 2,705,000	$ 1,630,000
Number of Shares, Vested		53,304	203,165
Number of years of service before cliff vesting		3 years	3 years
Weighted Average Grant-Date Fair Value, Granted		$ 20.21	$ 16.24	$ 15.22
Number of forfeited common stock that is granted		33,269	20,815
Number of shares granted to employees		282,030	290,977
Unamortized Stock-Based Compensation		$ 5,166,000	$ 3,788,000	$ 2,153,000	$ 5,166,000
Remaining Weighted Average Period (years)		1 year 3 months 18 days	1 year	1 year 7 months 6 days
Common Stock Grants \| Vested immediately
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		25,312	26,820
Common Stock Grants \| Vest 6 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		1,017
Common Stock Grants \| Vest eighteen months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		1,017
Common Stock Grants \| Vest two year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		5,250	1,782
Common Stock Grants \| Vest one-half each year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested			1,300
Common Stock Grants \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued by equity investee		282,030	290,977
The total fair value recognized over the vesting period		$ 5,651,000	$ 4,726,000
Number of forfeited common stock that is granted		33,269	20,815
Common Stock Grants \| Common Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 16.85	$ 14.92
Common Stock Grants \| Common Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 23.60	$ 19.90
Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 2,148,000	$ 1,248,000	$ 995,000
Number of Shares, Vested		22,857	48,046
Weighted Average Grant-Date Fair Value, Granted		$ 18.74	$ 15.43
Number of forfeited common stock that is granted		6,455	13,513
Number of shares granted to employees	52,170	130,332	128,594
Targeted performance percentage	200.00%	200.00%	200.00%	200.00%	200.00%
Target performance percentage to meet performance incentive stock options based on market		125.00%
Additional expenses recognized		$ 0
Unamortized Stock-Based Compensation		$ 2,565,000	$ 1,642,000	$ 796,000	$ 2,565,000
Remaining Weighted Average Period (years)		1 year 10 months 24 days	1 year 9 months 18 days	1 year 8 months 12 days
Performance Based Restricted Shares \| Vested on March 9, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff vesting date	Jan. 06, 2019	Mar. 09, 2021	Feb. 08, 2020
Performance Based Restricted Shares \| 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, 2018 and ending December 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance		80.00%
Earnings before income tax goal weight, percentage		50.00%
Net sales goal weight, percentage		30.00%
Performance Based Restricted Shares \| Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2018, Ending December 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income tax goal weight, percentage		20.00%
Performance Based Restricted Shares \| 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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance			80.00%
Earnings before income tax goal weight, percentage			50.00%
Net sales goal weight, percentage			30.00%
Performance Based Restricted Shares \| Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2017 through December 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income tax goal weight, percentage			20.00%
Performance Based Restricted Shares \| 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 through December 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted				$ 15.08
Percentage of shares vesting based on Performance	80.00%
Earnings before income tax goal weight, percentage	50.00%
Net sales goal weight, percentage	30.00%
Performance Based Restricted Shares \| Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2016 through December 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted				$ 11.63
Earnings before income tax goal weight, percentage	20.00%
Performance Based Restricted Shares \| Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, Commencing January 1, 2018 and Ending December 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 18.27
Performance Based Restricted Shares \| Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation for the Period Commencing January 1, 2018 and Ending December 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 15.43
Performance Based Restricted Shares \| Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, Commencing January 1, 2017 and Ending December 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted			$ 16.10
Performance Based Restricted Shares \| 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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted			$ 12.60
Unvested Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized Stock-Based Compensation		$ 2,565,000			$ 2,565,000
Remaining Weighted Average Period (years)		1 year 10 months 24 days
Equity Incentive Plan Nineteen Ninety Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities remaining available for future issuance		1,568,888			1,568,888
Incentive Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised		$ 955,000	$ 545,000	$ 493,000
Cash received from stock option exercised		951,000	468,000	442,000
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Options granted					0
Stock-based compensation		$ 0	$ 416,000	$ 188,000