Technology and content expense (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Technology and content expense
Employee benefits expense - Technology and content	€ 13,251	€ 13,136	€ 11,691
IT maintenance and infrastructure expense	14,593	14,136	10,741
Technology and content expense	€ 27,844	€ 27,272	€ 22,432

Technology and content expenses consist principally of research and development activities, including wages and benefits, for employees involved in application, production, maintenance, operation for new and existing goods and services, as well as other technology infrastructure expense.

No definition available.

Name:	jmia_TechnologyAndContentExpense
Namespace Prefix:	jmia_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration