XML 46 R34.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Investments (Details 2) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Gross unrealized gains | $ 0 | $ 15,935
Gross unrealized losses | (26,672) | (6,914)
Estimated fair value | 4,192,837 | 3,897,150
Hedge Funds [Member] |  |
Cost | 1,987,040 | 1,987,040
Gross gains | 2,205,797 | 1,910,110
Estimated fair value | 4,192,837 | 3,897,150
Fixed income exchange traded funds [Member] |  |
Cost | 3,711,232 | 3,711,232
Gross unrealized gains | 0 |
Gross unrealized losses | (775,432) | (669,232)
Estimated fair value | 2,935,800 | 3,042,000
Mutual funds [Member] |  |
Cost | 502,252 | 622,209
Gross unrealized gains | 399,134 | 314,816
Gross unrealized losses | 0 | 0
Estimated fair value | 901,386 | 937,025
FHLBNY common stock [Member] |  |
Cost | 66,000 | 69,400
Gross unrealized gains | 0 | 0
Gross unrealized losses | 0 | 0
Estimated fair value | 66,000 | 69,400
Total [Member] |  |
Cost | 14,029,806 | 17,986,783
Gross unrealized gains | 399,134 | 314,816
Gross unrealized losses | (3,000,702) | (3,539,259)
Estimated fair value | 11,428,238 | 14,762,340
Preferred Stock [Member] |  |
Cost | 9,750,322 | 13,583,942
Gross unrealized gains | 0 | 0
Gross unrealized losses | (2,225,270) | (2,870,027)
Estimated fair value | $ 7,525,052 | $ 10,713,915

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

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

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

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

X
- Definition Amount of investments classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(3)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_OtherInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=king_HedgeFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=king_FixedIncomeExchangeTradedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=king_MutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=king_FhlbnyCommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=king_AggregateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=king_PreferredStockEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |