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v3.23.1

Property and Casualty Insurance Activity (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Change in unearned premiums [Member] |  |
Assumed | $ 0 | $ 0
Ceeded | 1,953,322 | (637,535)
Net | 4,286,206 | 1,755,192
Direct | 2,332,884 | 2,392,727
Premiums earned [Member] |  |
Assumed | 0 | 0
Ceeded | (21,675,377) | (18,703,244)
Net | 28,254,953 | 26,673,380
Direct | 49,930,330 | 45,376,624
Premiums written Member |  |
Assumed | 0 | 0
Ceeded | (23,628,699) | (18,065,709)
Net | 23,968,747 | 24,918,188
Direct | $ 47,597,446 | $ 42,983,897

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: |