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v3.24.3

Accrued and Other Liabilities - Additional Information (Details) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 CAD ($) | Sep. 30, 2024 USD ($) | Oct. 02, 2023
Assets Acquisition of Amika Mobile Corporation [Member] |  |  |
Asset purchase agreement, deduction from liability | $ 1,000 | $ 736 |
Asset purchase agreement, deduction, term (year) |  |  | 3 years
Minimum [Member] |  |  |
Extended product warranty term (year) | 1 year | 1 year |
Maximum [Member] |  |  |
Extended product warranty term (year) | 2 years | 2 years |

X
- Definition The amount of deduction from liabilities under an asset purchase agreement. + References No definition available. + Details
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Namespace Prefix: | gnss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The period of time that deductions can be made under an asset purchase agreement. + References No definition available. + Details
Name: | gnss_AssetPurchaseAgreementDeductionTerm
Namespace Prefix: | gnss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents term of extended product warranty. + References No definition available. + Details
Name: | gnss_ExtendedProductWarrantyTerm
Namespace Prefix: | gnss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=gnss_AssetsAcquisitionOfAmikaMobileCorporationMember
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: |