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TAXATION - Movement of Valuation Allowance (Details) - HKD ($) $ in Thousands | 6 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Movement of Valuation Allowance |  |  |  |
Balance at beginning of the period | $ 169,422 | $ 67,768 | $ 169,422 | $ 67,768
Additions | 58,939 | 52,234 | 89,878 | 92,445
Reversals | (57,639) | (748) | (121,649) | (669)
Balance at end of the period | $ 170,722 | $ 119,255 | $ 137,651 | $ 159,544

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | futu_
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- Definition Amount of valuation allowance, deferred tax asset, additions. + References No definition available. + Details
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- Definition Amount of valuation allowance, deferred tax asset, reversals. + References No definition available. + Details
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Namespace Prefix: | futu_
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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