XML 232 R73.htm IDEA: XBRL DOCUMENT
v3.25.2

Income Taxes - Schedule of Net Operating Loss Carry Forwards (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($)
US [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Amount | $ 3,257,086
Operating loss carry forwards Expiration year | Indefinite
Minimum [Member] | US [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Expiration year |
Maximum [Member] | US [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Expiration year |
2043 [Member] | US [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Amount | $ 2,426,941
Operating loss carry forwards Expiration year | 2043 years
Tax Year 2044 [Member] | US [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Amount | $ 821,964
Operating loss carry forwards Expiration year | 2044 years
2031-2034 [Member] | Japan [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Amount | $ 4,528,302
2031-2034 [Member] | Minimum [Member] | Japan [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Expiration year | 2031 years
2031-2034 [Member] | Maximum [Member] | Japan [Member] |
Schedule of Net Operating Loss Carry Forwards[Line Items] |
Operating loss carry forwards Expiration year | 2034 years

X
- Definition Operating loss carry forwards expiration year. + References No definition available. + Details
Name: | kbsx_OperatingLossCarryForwardsExpirationYear
Namespace Prefix: | kbsx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating loss carry forwards expiration year indefinite. + References No definition available. + Details
Name: | kbsx_OperatingLossCarryForwardsExpirationYearIndefinite
Namespace Prefix: | kbsx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-2A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-23 + Details
Name: | us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=kbsx_TaxYear2043Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=kbsx_TaxYear2044Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=kbsx_TaxYear20312034Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_NationalTaxAgencyJapanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |