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Stock Based Compensation - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2017 | Feb. 28, 2017 | Mar. 31, 2020 | Mar. 31, 2019
Performance Based Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of Shares, Granted |  |  | 0 | 0
Common Stock Grants |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  | $ 18.63 | $ 17.34
Unamortized Stock-Based Compensation |  |  | $ 4,555,000 | $ 9,238,000
Remaining Weighted Average Period (years) |  |  | 1 year 6 months | 2 years 4 months 24 days
Number of Shares, Granted |  |  | 4,185 | 290,679
Common Stock Grants | Employees |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Period of service before cliff vesting |  |  | 6 months | 3 years
Common Stock Grants | Employees | First Anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares expected to vest |  |  | 1,000 |
Common Stock Grants | Employees | Third Anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares expected to vest |  |  | 685 |
Common Stock Grants | Employees | Six Month Anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares expected to vest |  |  | 500 |
Common Stock Grants | Common Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  | $ 18.63 | $ 17.34
Common Stock Grants | Common Stock | Employees |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares issued by equity investee |  |  | 4,185 | 290,679
Number of shares expected to vest |  |  | 2,000 |
Unvested Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized Stock-Based Compensation |  |  | $ 4,555,000 |
Remaining Weighted Average Period (years) |  |  | 1 year 6 months |
Performance Based Restricted Shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  | $ 16.47
Unamortized Stock-Based Compensation |  |  | $ 2,288,000 | $ 4,524,000
Remaining Weighted Average Period (years) |  |  | 1 year 8 months 12 days | 2 years 4 months 24 days
Number of Shares, Granted |  |  | 0 | 137,557
Targeted performance percentage |  |  | 200.00% | 200.00%
Target performance percentage to meet performance incentive stock options based on market | 125.00% | 50.00% |  |
Additional expenses recognized |  |  | $ 0 |
Number of Share, Additional granted based on performance |  |  | 76,445 | 41,568
Performance Based Restricted Shares | Vested on March 9, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Cliff vesting date |  |  |  | Mar. 28, 2022
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, 2019 through December 31, 2021 |  |  |  |
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, 2019 through December 31, 2021 |  |  |  |
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, 2019 and Ending December 31, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  | $ 17.34
Performance Based Restricted Shares | Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation for the Period Commencing January 1, 2019 and Ending December 31, 2021 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  | $ 13.01
Unvested Performance Shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized Stock-Based Compensation |  |  | $ 2,288,000 |
Remaining Weighted Average Period (years) |  |  | 1 year 8 months 12 days |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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