Annual Bonus, Maximum, as Multiple of Base Salary

No definition available.

Name:	king_AnnualBonusMaximumAsMultipleOfBaseSalary
Namespace Prefix:	king_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent Of Average Per Annum

+ References

No definition available.

+ Details

Name:	king_PercentOfAveragePerAnnum
Namespace Prefix:	king_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Termination Payment, As Multiple of Annual Base Salary and Accrued Bonus

+ References

No definition available.

+ Details

Name:	king_TerminationPaymentAsMultipleOfAnnualBaseSalaryAndAccruedBonus
Namespace Prefix:	king_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense for salary and wage arising from service rendered by nonofficer and officer employees. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

No definition available.

+ Details

Name:	us-gaap_SalariesWagesAndOfficersCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RestatementAxis=king_AmendedEmploymentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=king_MeryGoldenChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Apr. 27, 2026	Apr. 17, 2026	Jun. 27, 2022	Mar. 31, 2026	Mar. 31, 2025
Subsequent Event [Line Items]
Dividends declared and paid per common share (in dollars per share)				$ 0.05	$ 0
Subsequent Event
Subsequent Event [Line Items]
Dividends declared and paid per common share (in dollars per share)	$ 0.05
Amended Employment Agreement \| Subsequent Event
Subsequent Event [Line Items]
Percent of average per annum		3.00%
Termination payment, as multiple of annual base salary and accrued bonus		1.5
Granted (in shares)		40,000
Amended Employment Agreement \| Mery Golden Chief Operating Officer
Subsequent Event [Line Items]
Annual salary received			$ 500
Amended Employment Agreement \| Mery Golden Chief Operating Officer \| Subsequent Event
Subsequent Event [Line Items]
Annual salary received		$ 550
Annual bonus, maximum, as multiple of base salary		1.25
Percent of average per annum		3.00%