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Debt (Details 2)	9 Months Ended
	Sep. 30, 2023
December 30, 2022 to December 29, 2023
Accrued and unpaid interest	102.00%
December 30, 2023 to September 29, 2024
Accrued and unpaid interest	101.00%
September 30, 2024 to December 29, 2024
Accrued and unpaid interest	100.00%

X

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=king_DecemberThirtyTwentyTwentyTwoToTwentyNineDecemberTwentyTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=king_DecemberThirtyTwentyTwentyThreeToTwentyNineSepTwentyTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=king_SepThirtyTwentyTwentyFourToTwentyNineDecTwentyTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: