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Equity Plan Awards - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Performance Based Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of Shares, Granted | 160,706 | 137,557 | 130,332 |
Targeted performance percentage | 200.00% | 200.00% | 200.00% |
Weighted Average Grant-Date Fair Value, Granted | $ 14.29 | $ 16.96 | $ 18.74 |
Additional expenses recognized | $ 0 |  |  |
Number of Share, Additional granted based on performance | 76,445 | 42,368 |  |
Performance Based Restricted Stock 2018 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Target performance percentage to meet performance incentive stock options based on EBIT and net sales | 200.00% |  |  |
Target performance percentage to meet performance incentive stock options based on market | 38.00% |  |  |
Additional expenses recognized | $ 0 |  |  |
Performance Based Restricted Stock 2017 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Target performance percentage to meet performance incentive stock options based on market |  | 50.00% |  |
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
Vested on March 28, 2022 | Performance Based Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Cliff vesting date | May 13, 2023 | Mar. 28, 2022 | Mar. 09, 2021 |
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 | Performance Based Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of shares vesting based on Performance | 80.00% | 80.00% | 80.00% |
Earnings before income taxes goal weight, percentage | 50.00% | 50.00% | 50.00% |
Net sales goal weight, percentage | 30.00% | 30.00% | 30.00% |
Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2019 through December 31, 2021 | Performance Based Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Earnings before income taxes goal weight, percentage | 20.00% | 20.00% | 20.00% |
Equity Incentive Plan 1993 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of securities remaining available for future issuance | 1,104,637 |  |  |
Incentive Stock Option Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total intrinsic value of options exercised | $ 1,393,000 | $ 393,000 | $ 955,000 |
Cash received from stock option exercised | $ 1,533,000 | $ 454,000 | $ 951,000 |

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