6. Property and Casualty Insurance Activity (Details 3)	Sep. 30, 2019 USD ($)
2010
2010	$ 2,566
2011
2010	3,947
2011	3,740
2012
2010	4,972
2011	5,117
2012	3,950
2013
2010	5,602
2011	6,228
2012	5,770
2013	3,405
2014
2010	6,323
2011	7,170
2012	7,127
2013	5,303
2014	5,710
2015
2010	6,576
2011	8,139
2012	8,196
2013	6,633
2014	9,429
2015	12,295
2016
2010	6,720
2011	8,540
2012	9,187
2013	7,591
2014	10,738
2015	16,181
2016	15,364
2017
2010	6,772
2011	8,702
2012	10,236
2013	8,407
2014	11,770
2015	18,266
2016	19,001
2017	16,704
2018
2010	6,780
2011	8,727
2012	10,323
2013	9,056
2014	13,819
2015	19,984
2016	21,106
2017	24,820
2018	32,383
2019
2010	6,780
2011	8,778
2012	10,422
2013	9,235
2014	14,692
2015	20,982
2016	22,988
2017	27,470
2018	43,383
2019	30,115
Total	194,845
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented	59,421
All outstanding liabilities before 2009, net of reinsurance	143
Liabilities for claims and claim adjustment expenses, net of reinsurance	$ 59,564

No definition available.

Name:	KINS_AllOutstandingLiabilitiesBeforeNetOfReinsurance
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2010
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2011
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2012
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2013
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2014
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2015
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2016
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2017
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2018
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	KINS_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2019
Namespace Prefix:	KINS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(13)(a))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (cc)
-URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

+ Details

Name:	us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_RangeAxis=KINS_TwoThousandTenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandTwelveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=KINS_TwoThousandNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: