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v3.23.2

Note 10 - Accrued and Other Liabilities (Details Textual) | 9 Months Ended
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Jun. 30, 2023
Minimum [Member] |
Extended Product Warranty Term | 1 year
Maximum [Member] |
Extended Product Warranty Term | 2 years

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

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: |