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Equity (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 | Oct. 31, 2019 | Sep. 30, 2016 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2021 | Feb. 28, 2021 | Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value (in Dollars per share) |  |  |  |  | $ 12.16 |  |  |  |  |
Covid 19, description | due to the potential impact on future net sales and operating results resulting from the COVID-19 pandemic, the estimated number of shares to be distributed, after forfeited shares, was reduced from 142,571 to 82,162. As the Company had already purchased shares in contemplation of the higher anticipated distribution, shares purchased in excess of the reduced anticipated distribution were transferred to treasury shares at the Interparfums SA level. |  |  |  |  |  |  |  |  |
Percentage of increase in annual dividend |  | 20.00% |  |  |  |  |  |  |  |
Dividends payable, amount per share (in Dollars per share) |  | $ 1.32 |  |  |  |  |  |  |  |
Interparfums SA Subsidiary [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Original cost of grant |  |  | $ 3,900,000 |  |  |  |  |  |  |
Revaluation resulted in reduction of cost, description |  |  |  | The original cost of the grant was approximately $4.4 million, and the March 2020 revaluation resulted in a reduction of the cost, to approximately $2.5 million. |  |  |  |  |  |
Reduction of cost, net |  |  |  | $ 300,000 |  |  |  |  |  |
Modification resulted revised cost |  |  |  |  | $ 3,800,000 |  |  |  |  |
Equity Option [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value of shares vested |  |  |  |  | 1,700,000 | $ 1,400,000 |  |  |  |
Aggregate intrinsic value of options outstanding |  |  |  |  | $ 8.7 |  |  |  |  |
Term |  |  |  |  | 5 years |  |  |  |  |
Weighted average grant date fair value (in Dollars per share) |  |  |  |  | $ 12.16 | $ 14.14 | $ 14.31 |  |  |
Options exercisable, weighted average exercise price (in Dollars per share) |  |  |  |  | $ 43.35 |  |  |  |  |
Weighted average remaining contractual life of options outstanding, options exercisable |  |  |  |  | 2 years 7 months 17 days |  |  |  |  |
Aggregate intrinsic value of exercisable options |  |  |  |  | $ 6,900,000 |  |  |  |  |
Equity Option [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in Shares) |  |  |  |  | 580,715 |  |  |  |  |
Aggregate intrinsic value of options outstanding |  |  |  |  | $ 4.4 |  |  |  |  |
Maximum [Member] | Equity Option [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  | 5 years |  |  |  |  |
Minimum [Member] | Equity Option [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  | 4 years |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Dividends payable, amount per share (in Dollars per share) |  |  |  |  |  |  |  | $ 0.25 |  |
Interparfums SA Subsidiary [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share based payment percentage |  |  | 73.00% |  |  |  |  |  |  |
Adjusted for stock splits (in Shares) |  |  |  |  | 132,032 |  |  |  |  |
Interparfums SA Subsidiary [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Adjusted for stock splits (in Shares) |  |  |  |  |  |  | 26,600 |  |  |
Employees [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Adjusted Stock share splits (in Shares) |  |  |  |  |  |  |  |  |  | 172,851
Employees [Member] | Interparfums SA Subsidiary [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Adjusted for stock splits (in Shares) |  |  | 15,100 |  |  |  |  |  |  |
Officers And Managers [Member] | Interparfums SA Subsidiary [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of options outstanding |  |  | $ 133,000 |  |  |  |  |  |  |
Adjusted for stock splits (in Shares) |  |  |  |  |  |  | 133,000 |  |  |
Board of Directos [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Dividends payable, amount per share (in Dollars per share) |  |  |  |  |  |  |  |  | $ 1.00 |

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