Statement Of Changes In Equity [Abstract]

Transgene - Filing #2816866

Concept	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2020-01-01	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	31 092 EUR	2 933 EUR	—	—	67 209 EUR	—	—	1 423 EUR	—	19 536 EUR	67 209 EUR	67 441 EUR	—	48 886 EUR	—	—	—	—	—	—	50 716 EUR	39 212 EUR	—	50 716 EUR	1 051 EUR	13 861 EUR	1 726 EUR	—	41 921 EUR	—	—	17 231 EUR	2 026 EUR	36 978 EUR	37 712 EUR	1 058 EUR	83 265 EUR	66 163 EUR	18 804 EUR	65 697 EUR	2 026 EUR	37 712 EUR	37 444 EUR	1 058 EUR	83 265 EUR	18 804 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	-  EUR	19 536 EUR	—	-  EUR	-  EUR	—	19 536 EUR	—	—	—	-  EUR	—	19 536 EUR	-  EUR	17 231 EUR	-  EUR	-  EUR	-  EUR	—	—	-  EUR	—	—	—	—	-  EUR	—	17 231 EUR	17 231 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	-  EUR	61,000 EUR	—	61,000 EUR	-  EUR	—	-  EUR	—	—	—	-  EUR	—	372,000 EUR	-  EUR	7,000 EUR	-  EUR	70,000 EUR	-  EUR	—	—	-  EUR	—	—	—	—	-  EUR	—	70,000 EUR	-  EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	-  EUR	19 908 EUR	—	372,000 EUR	-  EUR	—	19 536 EUR	—	—	—	-  EUR	—	19 908 EUR	-  EUR	17 224 EUR	-  EUR	7,000 EUR	-  EUR	—	—	-  EUR	—	—	—	—	-  EUR	—	17 224 EUR	17 231 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Issue of equity	—	—	-  EUR	33 342 EUR	—	-  EUR	26 377 EUR	—	-  EUR	—	—	—	6 965 EUR	—	—	-  EUR	—	-  EUR	-  EUR	-  EUR	—	—	-  EUR	—	—	—	—	-  EUR	—	-  EUR	-  EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	—	57,000 EUR	57,000 EUR	—	-  EUR	-  EUR	—	-  EUR	—	—	—	-  EUR	—	—	-  EUR	—	-  EUR	-  EUR	32,000 EUR	—	—	-  EUR	—	—	—	—	-  EUR	—	32,000 EUR	-  EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	-  EUR	3 002 EUR	—	-  EUR	3 002 EUR	—	-  EUR	—	—	—	-  EUR	—	—	-  EUR	—	-  EUR	-  EUR	-  EUR	—	—	-  EUR	—	—	—	—	1 744 EUR	—	1 744 EUR	-  EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—