Name:	futu_RequiredGeneralReserveFundRegisteredCapitalRatioToDeForceCompulsoryNetProfitAllocationToGeneralReserveFund
Namespace Prefix:	futu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The required percentage of the after-tax-profit to be set aside as general reserve fund under PRC law.

No definition available.

Name:	futu_RequiredPortionOfAfterTaxProfitAppropriatedToGeneralReserveFundUnderPrcLaw
Namespace Prefix:	futu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The required percentage of the after-tax-profit to be set aside as statutory surplus fund under PRC law

No definition available.

Name:	futu_RequiredPortionOfAfterTaxProfitAppropriatedToStatutorySurplusFundUnderPrcLaw
Namespace Prefix:	futu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the ratio of the statutory surplus fund to statutory registered capital after which mandatory contributions to the statutory surplus fund are no longer required.

No definition available.

Name:	futu_RequiredStatutorySurplusFundRegisteredCapitalRatioToDeForceCompulsoryNetProfitAllocationToStatutorySurplusFund
Namespace Prefix:	futu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Name:	us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_RestrictedInvestmentsNoteAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The percent of net assets of the aggregate value of all restricted investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.6(c))
-URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611133-123010

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Footnote 11(c)))
-URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010