Statement Of Changes In Equity [Abstract]

Investors House Oyj - Filing #2195995

Concept	2021-01-01 to 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	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	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	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	2020-01-01 to 2020-12-31	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	—	8 680 EUR	—	36 714 EUR	—	24 996 EUR	36 239 EUR	475,000 EUR	7,000 EUR	2 556 EUR	—	—	—	11 023 EUR	1 017 EUR	37 253 EUR	2 556 EUR	—	—	7,000 EUR	38 270 EUR	—	23 667 EUR	—	44 966 EUR	17 156 EUR	7,000 EUR	15 199 EUR	27 204 EUR	2 556 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	632,000 EUR	—	—	—	—	—	—	—	769,000 EUR	632,000 EUR	1 961 EUR	—	—	—	—	2 195 EUR	—	—	—	—	—	2 195 EUR	—	—	—	—	—	—
Comprehensive income	137,000 EUR	—	632,000 EUR	—	—	—	—	—	—	—	769,000 EUR	632,000 EUR	1 961 EUR	—	—	—	—	2 195 EUR	—	—	—	234,000 EUR	—	2 195 EUR	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	1 636 EUR	—	—	—	—	—	—	—	—	1 636 EUR	—	—	—	—	—	1 491 EUR	3 187 EUR	—	—	—	—	4 678 EUR	—	—	—	—	—	—
Increase (decrease) through other changes, equity	405,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	—	69,000 EUR	—	—	—	—	—	—	—	—	69,000 EUR	—	—	—	—	—	960,000 EUR	—	—	—	2 351 EUR	—	960,000 EUR	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	1 323 EUR	—	1 329 EUR	—	—	—	—	—	—	6,000 EUR	—	—	—	—	—	470,000 EUR	6,000 EUR	—	—	—	—	476,000 EUR	—	—	—	—	—	—