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v3.21.2

Debt (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Long-term debt, net | $ 29,779,746 | $ 29,647,611
Issuance costs [Member] |  |
Long-term debt, net | (179,702) | (287,506)
5.50% Senior Unsecured Notes [Member] |  |
Long-term debt, net | 30,000,000 | 30,000,000
Discount [Member] |  |
Long-term debt, net | $ (40,552) | $ (64,883)

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References No definition available. + Details
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Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=kins_DiscountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |