Statement Of Changes In Equity [Abstract]

GENFIT - Filing #2816634

Concept	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	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 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	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	986,000 EUR	—	404 090 EUR	—	—	119 097 EUR	—	—	—	67 259 EUR	119 097 EUR	0 EUR	444 438 EUR	22,000 EUR	12 454 EUR	—	—	—	303 086 EUR	—	0 EUR	—	16 430 EUR	9 722 EUR	—	811,000 EUR	92,000 EUR	379 057 EUR	—	16 430 EUR	—	—	101 221 EUR	—	—	—	84 065 EUR	0 EUR	—	—	14,000 EUR	—	—	84 065 EUR	377 821 EUR	237 862 EUR	—	478,000 EUR	9 715 EUR	—	—	65 144 EUR	—	—	6,000 EUR	251 554 EUR	730,000 EUR	20 939 EUR	0 EUR	20 939 EUR	7 796 EUR	79 521 EUR	158 167 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	67 259 EUR	—	—	—	67 259 EUR	—	—	—	—	—	—	—	67 259 EUR	—	—	101 221 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	101 221 EUR	101 221 EUR	—	—	—	65 144 EUR	—	—	—	—	—	—	65 144 EUR	—	—	—	—	—	65 144 EUR	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	—	—	330,000 EUR	—	—	113,000 EUR	—	—	—	—	—	—	—	—	330,000 EUR	216,000 EUR	—	90,000 EUR	—	—	—	—	196,000 EUR	—	—	—	—	—	106,000 EUR	—	—	—	—	90,000 EUR	—	—	8,000 EUR	160,000 EUR	—	168,000 EUR	—	—	—	—	160,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	0 EUR	—	0 EUR	67 589 EUR	—	0 EUR	113,000 EUR	67 259 EUR	—	—	—	—	—	—	0 EUR	67 589 EUR	216,000 EUR	—	101 131 EUR	—	0 EUR	—	—	196,000 EUR	—	—	—	0 EUR	—	106,000 EUR	0 EUR	—	0 EUR	101 221 EUR	101 131 EUR	—	—	8,000 EUR	65 304 EUR	—	168,000 EUR	0 EUR	—	—	—	65 304 EUR	—	—	0 EUR	0 EUR	—	65 144 EUR	0 EUR	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	0 EUR	—	0 EUR	—	—	—	—	—	—	—	—	—	0 EUR	—	—	268,000 EUR	—	—	—	—	268,000 EUR	—	—	—	—	—	—	—	—	0 EUR	—	268,000 EUR	—	—	—	43,000 EUR	—	—	—	—	—	—	43,000 EUR	—	—	—	—	—	—	43,000 EUR	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	—	—	174,000 EUR	174,000 EUR	—	—	—	—	—	—	—	—	—	—	—	174,000 EUR	—	—	—	—	333,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	252,000 EUR	—	—	—	—	—	—	252,000 EUR	—	—	252,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	—	470,000 EUR	—	470,000 EUR	—	—	—	—	—	—	—	—	—	470,000 EUR	—	—	1 236 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	1 236 EUR	—	1 236 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1 657 EUR	—	—	—	—	—	—	—	—	—