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OTHER CURRENT ASSETS - Summary of other current assets (Parenthetical) (Detail) ¥ in Thousands, $ in Thousands	Mar. 31, 2023 CNY (¥)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 CNY (¥)
Other Assets [Abstract]
Deposit for share settlement	¥ 20,602	$ 3,000	¥ 21,341
Due from shareholders	¥ 13,910
Percentage of outstanding shares owned	5.00%	5.00%

X

- Definition

Deposit for share settlement current.

+ References

No definition available.

+ Details

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Namespace Prefix:	qk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Due from shareholders current.

+ References

No definition available.

+ Details

Name:	qk_DueFromShareholdersCurrent
Namespace Prefix:	qk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of outstanding shares owned.

+ References

No definition available.

+ Details

Name:	qk_PercentageOfOutstandingSharesOwned
Namespace Prefix:	qk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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