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Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation | $ 1,510 |  | $ 1,469 |  | $ 2,995 | $ 2,778
Unamortized Stock-Based Compensation | $ 3,863 |  |  |  | $ 3,863 |
Remaining Weighted Average Period (years) |  |  |  |  | 2 years 2 months 12 days |
Performance Based Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of Shares, Granted |  |  |  |  | 0 | 0
Incentive Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Employees options granted | 0 |  |  |  | 0 |
Common Stock Grants |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares vested | 32,771 | 105,582 | 20,313 | 8,800 |  |
Weighted Average Grant-Date Fair Value, Granted | $ 13.34 | $ 17.34 | $ 23.66 | $ 19.97 |  |
Stock-based compensation | $ 981 |  | $ 892 |  | $ 1,669 | $ 1,557
Unamortized Stock-Based Compensation | $ 8,091 |  | $ 7,071 |  | $ 8,091 | $ 7,071
Remaining Weighted Average Period (years) |  |  |  |  | 2 years 2 months 12 days | 2 years 2 months 12 days
Number of Shares, Granted | 40,522 | 297,679 | 22,308 | 254,972 |  |
Common Stock Grants | Employee and Directors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares vested |  |  |  |  |  | 19,313
Number of shares expected to vest |  |  | 19,760 |  |  | 19,760
Common Stock Grants | Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  |  | $ 16.86 | $ 20.27
Common Stock Grants | Common Stock | Employee and Directors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares issued by equity investee |  |  |  |  | 338,201 | 277,280
Common Stock Grants | Vested immediately | Employee and Directors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares vested |  |  |  |  | 31,771 |
Common Stock Grants | Vesting Between 95 Days to 1,115 Days | Employee and Directors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares expected to vest | 9,000 |  |  |  | 9,000 |
Common Stock Grants | After One Year | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of days of service before cliff vesting |  |  |  |  | 95 days | 178 days
Common Stock Grants | After One Year | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of days of service before cliff vesting |  |  |  |  | 1115 days | 1060 days
Common Stock Grants | Three Equal Tranches | Employee and Directors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares expected to vest | 6,751 |  |  |  | 6,751 |
Common Stock Grants | 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
Unvested Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unamortized Stock-Based Compensation | $ 8,091 |  |  |  | $ 8,091 |
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 |  | 90,872 |  | 14,625 |  |
Weighted Average Grant-Date Fair Value, Granted |  | $ 16.47 | $ 22.69 | $ 18.79 | $ 16.47 | $ 18.91
Stock-based compensation | 430 |  | $ 481 |  | $ 1,131 | $ 1,028
Unamortized Stock-Based Compensation | $ 3,863 |  | $ 3,336 |  | $ 3,863 | $ 3,336
Remaining Weighted Average Period (years) |  |  |  |  | 2 years 2 months 12 days | 2 years 2 months 12 days
Number of Shares, Granted |  | 137,557 | 3,850 | 122,446 | 137,557 | 126,296
Targeted performance percentage | 200.00% |  | 200.00% |  | 200.00% | 200.00%
Performance Based Restricted Shares | Vested on March 28, 2022 |  |  |  |  |  |
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 taxes 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 taxes goal weight, percentage |  |  |  |  | 20.00% |
Performance Based Restricted Shares | Vested on March 9, 2021 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Cliff vesting date |  |  |  |  |  | Mar. 09, 2021
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 taxes 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 and ending December 31, 2020 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Earnings before income taxes 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 |  |  |  |  | $ 15.46 |

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- Definition 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. + 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=109197908&loc=d3e5070-113901 + Details
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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). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition 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). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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