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Property and Casualty Insurance Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Change in unearned premiums [Member]
Direct	$ 671,762	$ 2,332,884
Assumed	0	0
Ceded	(9,947,259)	(5,569,824)
Net	(9,275,497)	(3,236,940)
Premiums earned [Member]
Direct	49,996,378	49,930,330
Assumed	0	0
Ceded	(21,176,476)	(21,675,377)
Net	28,819,902	28,254,953
Premiums written Member
Direct	49,324,616	47,597,446
Assumed	0	0
Ceded	(11,229,217)	(16,105,553)
Net	$ 38,095,399	$ 31,491,893

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- References

No definition available.

+ Details

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Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	king_NetPropertyAndCasultyInsuranceActivity
Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_ChangeinunearnedpremiumsMember
Namespace Prefix:
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Balance Type:
Period Type:

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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_PremiumsearnedMember
Namespace Prefix:
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Balance Type:
Period Type:

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- Details

Name:	srt_TitleOfIndividualAxis=king_PremiumswrittenMember
Namespace Prefix:
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Balance Type:
Period Type: