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v3.24.1.1.u2

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

X
- References No definition available. + Details
Name: | king_AssumedPropertyAndCasultyInsuranceActivity
Namespace Prefix: | king_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | king_CededPropertyAndCasultyInsuranceActivity
Namespace Prefix: | king_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | king_DirectPropertyAndCasultyInsuranceActivity
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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_ChangeinunearnedpremiumsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_PremiumsearnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=king_PremiumswrittenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |