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Share-based compensation - SOP 2020 narrative (Details) - SOP 2020 | 12 Months Ended
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Dec. 31, 2020 item shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Number of shares per option | shares | 1
Number of ADS per option | shares | 0.5
Options waiting period | 4 years
Number of trading days | 60 days
Options exercise period | 2 years
Minimum growth to exercise options (as a percent) | 10.00%
Number of quarters for vesting of some options | item | 2
Number of tranches | item | 2
1st tranche, percentage vesting | 66.70%
Period of vesting of first tranche | 2 years
2nd tranche, percentage vesting | 33.30%
Period of vesting of second tranche | 3 years
Option forfeiture period | 6 months

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The period of vesting of first tranche under share based compensation arrangement by share based payment award. + References No definition available. + Details
Name: | jmia_PeriodOfVestingOfFirstTrancheUnderShareBasedCompensationArrangementByShareBasedPaymentAward
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Period Type: | duration

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- Definition The period of vesting of the second tranche under the share based compensation plan. + References No definition available. + Details
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Namespace Prefix: | jmia_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of the entity's American Depositary Shares to be received for each option granted under the share-based compensation plan. Two of the entity's American Depositary Shares represent one share of Jumia. + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares of the entity's stock to be received for each option granted under the share-based compensation plan. + References No definition available. + Details
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Period Type: | duration

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- Definition The number of trading days considered when setting the exercise price of the share-based compensation award. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The length of the period, after expiration of the waiting period, during which recipients can exercise options received under the share based compensation plan. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The minimum annual growth in sales volume necessary in order to exercise options granted under the share-based compensation plan. + References No definition available. + Details
Name: | jmia_ShareBasedCompensationPlanOptionsMinimumAnnualGrowthInSalesVolumeForExercise
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of vesting tranches for options granted under the share-based compensation plan. + References No definition available. + Details
Name: | jmia_ShareBasedCompensationPlanOptionsNumberOfVestingTranches
Namespace Prefix: | jmia_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of options that vest in the first tranche. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The percentage of options that vest in the second tranche. + References No definition available. + Details
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Namespace Prefix: | jmia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The period during which former management beneficiaries incept work for a competitor of the entity which triggers forfeiture of unexercised options granted under the share-based compensation plan. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The number of consecutive quarters of positive Adjusted EBITDA that must occur by the specified date in order for part of the stock options granted to Functional Leaders to vest. + References No definition available. + Details
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- Definition The waiting period that must expire before options granted under the share-based compensation plan can be exercised. + References No definition available. + Details
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Period Type: | duration

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- Details
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