Earnings Before Income Tax Goal Weighted Percentage

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Earnings before income tax performance measure targeted percentage.

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Market price performance measure targeted percentage.

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Net Sales Goal Weighted Percentage

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Net sales performance measure targeted percentage.

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- Definition

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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- Definition

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

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- Definition

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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- Definition

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

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No definition available.

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Number of options outstanding, including both vested and non-vested options.

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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 ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 06, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 4,714	$ 3,167	$ 3,881
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		$ 345	$ 354	$ 431
Number of Shares, Outstanding		472,783	541,905	626,845	724,904
Remaining Weighted Average Period (years)			1 year	2 years
Nonstatutory Stock Options (“NSSO”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding		16,333
Common Stock Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 2,705	$ 1,630	$ 2,972
Number of Shares, Vested		203,165	152,479
Number of years of service before cliff vesting		3 years	3 years
Weighted Average Grant-Date Fair Value, Granted		$ 16.24	$ 15.22	$ 12.68
Number of forfeited common stock that is granted		20,815	35,615
Number of shares granted to employees		290,977	150,009
Unamortized Stock-Based Compensation		$ 3,788	$ 2,153	$ 2,153
Remaining Weighted Average Period (years)		1 year	1 year 7 months 6 days	1 year 3 months 18 days
Common Stock Grants \| Vested immediately
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		26,820	21,139
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	2,600
Common Stock Grants \| Vest two year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested		1,782	3,000
Common Stock Grants \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued by equity investee		290,977	150,009
The total fair value recognized over the vesting period		$ 4,726	$ 2,283
Number of forfeited common stock that is granted		20,815	35,615
Common Stock Grants \| Common Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 14.92	$ 15.08
Common Stock Grants \| Common Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted		$ 19.90	$ 17.35
Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 1,248	$ 995	$ 329
Number of Shares, Vested		48,046
Weighted Average Grant-Date Fair Value, Granted		$ 15.43	$ 14.39
Number of forfeited common stock that is granted		13,513	37,551
Number of shares granted to employees	52,170	128,594	52,170	10,696
Targeted performance percentage	200.00%	200.00%	200.00%	200.00%
Unamortized Stock-Based Compensation		$ 1,642	$ 796	$ 583
Remaining Weighted Average Period (years)		1 year 9 months 18 days	1 year 8 months 12 days	1 year 6 months
Performance Based Restricted Shares \| Vested on February 8, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested				7,500
Cliff vesting date	Jan. 06, 2019	Feb. 08, 2020		Jan. 05, 2018
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 \| Vested on August 1, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested				3,196
Cliff vesting date				Aug. 01, 2018
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, 2015 and ending December 31, 2017
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, 2015, Ending December 31, 2017
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 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
Performance Based Restricted Shares \| Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, 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 \| Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation 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			$ 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, 2015 and Ending December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted				$ 11.86
Performance Based Restricted Shares \| Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation for the Period Commencing January 1, 2015 and Ending December 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted				$ 9.48
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		2,000,579
Incentive Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised		$ 545	$ 493	$ 361
Cash received from stock option exercised		$ 468	$ 442	480
Number of Shares, Outstanding		472,783	541,905
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 416	$ 188	$ 149
Number of Shares, Outstanding		81,666	82,334	98,410
Target performance percentage to meet performance measure based on EBIT		200.00%
Target performance percentage to meet performance measure based on net sales		200.00%
Target performance percentage to meet performance incentive stock options based on market		200.00%