XML 75 R63.htm IDEA: XBRL DOCUMENT
v3.25.1

Stockholders Equity - Schedule of Stock Options Activity (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Number of Shares |  |
Number of options outstanding, Excercised (in shares) | (50,000) |
Exchange traded debt |  |
Number of Shares |  |
Number of options outstanding, Beginning (in shares) | 281,913 |
Number of options outstanding, Granted (in shares) | 0 |
Number of options outstanding, Expired/Forfeited (in shares) | (3,333) |
Number of options outstanding, ending (in shares) | 219,994 | 281,913
Number of options outstanding, vested and exercisable | 84,609 |
Weighted Average Exercise Price per Share |  |
Weighted average exercise price, Beginning balance (in dollars per share) | $ 2.71 |
Weighted average exercise price, Granted (in dollars per share) | 0 |
Weighted average exercise price, Excercised (in dollars per share) | 4.48 |
Weighted average exercise price, Expired/Forfeited (in dollars per share) | 2.25 |
Weighted average exercise price, Ending balance (in dollars per share) | 2.25 | $ 2.71
Weighted average price per share outstanding, vested and exercisable (in dollars per share) | $ 2.25 |
Weighted Average Remaining Contractual, Beginning balance |  | 3 years 8 months 26 days
Weighted Average Remaining Contractual, Expired/Forfeited | 3 years 10 months 17 days |
Weighted Average Remaining Contractual term, Ending balance | 3 years 9 months |
Weighted Average Remaining Contractual term, Ending balance Vested and Exercisable | 3 years 9 months 7 days |
Aggregate Intrinsic Value , Beginning | $ 3,517,111 |
Aggregate Intrinsic Value , Granted | 0 |
Aggregate Intrinsic Value , Exercised | 641,178 |
Aggregate Intrinsic Value , Expired/Forfeited | 53,761 |
Aggregate Intrinsic Value , Ending | 3,028,599 | $ 3,517,111
Aggregate Intrinsic Value , Vested and Exercisable | $ 1,164,790 |

X
- Definition Number of options outstanding, vested and exercisable + References No definition available. + Details
Name: | king_NumberOfOptionsOutstandingVestedAndExercisable
Namespace Prefix: | king_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, Excercised + References No definition available. + Details
Name: | king_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExcercisedInPeriod
Namespace Prefix: | king_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, Expired/Forfeited + References No definition available. + Details
Name: | king_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredForfeitedInPeriod
Namespace Prefix: | king_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Forfeited + References No definition available. + Details
Name: | king_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageForfeited
Namespace Prefix: | king_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Granted + References No definition available. + Details
Name: | king_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageGranted
Namespace Prefix: | king_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Outstanding + References No definition available. + Details
Name: | king_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageOutstanding
Namespace Prefix: | king_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate Intrinsic Value , Granted + References No definition available. + Details
Name: | king_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted
Namespace Prefix: | king_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate Intrinsic Value , Expired/Forfeited + References No definition available. + Details
Name: | king_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeited
Namespace Prefix: | king_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted Average Price per share outstanding, vested and exercisable + References No definition available. + Details
Name: | king_WeightedAveragePricePerShareOutstandingVestedAndExercisable
Namespace Prefix: | king_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted Average Remaining Contractual, Beginning balance + References No definition available. + Details
Name: | king_WeightedAverageRemainingContractualBeginningBalance
Namespace Prefix: | king_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted Average Remaining Contractual, Expired/Forfeited + References No definition available. + Details
Name: | king_WeightedAverageRemainingContractualExpiredForfeited
Namespace Prefix: | king_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted Average Remaining Contractual term, Ending balance + References No definition available. + Details
Name: | king_WeightedAverageRemainingContractualTermEndingBalance
Namespace Prefix: | king_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=king_ExchangeTradedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |