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Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 08, 2016 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2017 | Mar. 31, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Employees options granted |  | 0 |  |  |  | 0 |  |
Number of shares vested |  |  |  |  |  | 19,313 | 24,312 |
Number of shares expected to vest |  | 19,760 |  | 3,900 |  | 19,760 | 3,900 |
Stock-based compensation |  | $ 1,469 |  | $ 1,242 |  | $ 2,778 | $ 2,322 |
Performance Based Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares expected to vest |  | 77,598 |  |  |  | 77,598 |  | 77,598
Number of Shares, Granted |  |  |  |  |  | 0 | 0 |
Targeted performance percentage |  |  |  |  |  |  |  | 200.00%
Target performance percentage to meet performance measure based on net sales |  |  |  |  |  |  |  | 175.00%
Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares vested |  | 20,313 | 8,800 | 188,400 | 10,100 |  |  |
Weighted Average Grant-Date Fair Value, Granted |  | $ 23.66 | $ 19.97 | $ 17.08 | $ 16.10 |  |  |
Stock-based compensation |  | $ 988 |  | $ 777 |  | $ 1,750 | $ 1,433 |
Unamortized Stock-Based Compensation |  | $ 7,424 |  | $ 5,198 |  | $ 7,424 | $ 5,198 |
Remaining Weighted Average Period (years) |  | 2 years 2 months 12 days |  | 1 year 4 months 24 days |  | 2 years 2 months 12 days | 1 year 4 months 24 days |
Number of Shares, Granted |  | 22,308 | 254,972 | 38,502 | 251,475 |  |  |
Unvested Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unamortized Stock-Based Compensation |  | $ 7,424 |  |  |  | $ 7,424 |  |
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 |  |  | 14,625 | 48,046 |  |  |  |
Weighted Average Grant-Date Fair Value, Granted | $ 15.43 | $ 22.69 | $ 18.79 | $ 15.88 | $ 15.40 | $ 18.91 |  |
Stock-based compensation |  | $ 481 |  | $ 321 |  | $ 1,028 | $ 621 |
Unamortized Stock-Based Compensation |  | $ 3,336 |  | $ 2,157 |  | $ 3,336 | $ 2,157 |
Remaining Weighted Average Period (years) |  | 2 years 2 months 12 days |  | 2 years 3 months 18 days |  | 2 years 2 months 12 days | 2 years 3 months 18 days |
Number of Shares, Granted |  | 3,850 | 122,446 | 7,400 | 121,194 | 126,296 | 128,594 |
Targeted performance percentage |  | 200.00% |  | 200.00% |  | 200.00% | 200.00% |
Unvested Performance Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unamortized Stock-Based Compensation |  | $ 3,336 |  |  |  | $ 3,336 |  |
Remaining Weighted Average Period (years) |  |  |  |  |  | 2 years 2 months 12 days |  |
Common Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares issued by equity investee |  |  |  |  |  | 277,280 | 289,977 |
Weighted Average Grant-Date Fair Value, Granted |  |  |  |  |  | $ 20.27 | $ 16.23 |
Share-based Compensation Award, Tranche One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares expected to vest |  |  |  | 1,000 |  |  | 1,000 |
Number of days of service before cliff vesting |  |  |  |  |  |  | 1 year |
Share-based Compensation Award, Tranche One | Minimum |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of days of service before cliff vesting |  |  |  |  |  | 178 days |  |
Share-based Compensation Award, Tranche One | Maximum |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of days of service before cliff vesting |  |  |  |  |  | 1060 days |  |
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 |
After Two Year |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares expected to vest |  |  |  | 2,500 |  |  | 2,500 |
Number of days of service before cliff vesting |  |  |  |  |  |  | 2 years |
Vested on March 9, 2021 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Cliff vesting date |  |  |  |  |  | Mar. 09, 2021 | Feb. 08, 2020 |
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 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
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 Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2017 through December 31, 2019 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Earnings before income taxes goal weight, percentage |  |  |  |  |  | 20.00% |  |
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 and ending December 31, 2018 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
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 Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2016 and ending December 31, 2018 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Earnings before income taxes goal weight, percentage |  |  |  |  |  |  | 20.00% |
Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, Commencing January 1, 2017 and Ending December 31, 2019 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  |  |  | $ 18.88 |  |
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 | Performance Based Restricted Shares |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Weighted Average Grant-Date Fair Value, Granted |  |  |  |  |  | $ 15.85 |  |

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