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v3.22.1

Note 11 - Debt (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2022
Notes Tables |
Loans With Governmental Agencies [Table Text Block] |
|  | Principal |
Loans with governmental agencies, current portion |  | $ | 267 | (a)
Schedule of Debt [Table Text Block] |
Balance as of September 30, 2021 |  | $ | 296 |
Payments |  |  | (17 | )
Currency translation |  |  | (12 | )
Balance as of March 31, 2022 |  | $ | 267 |

X
- Definition Tabular disclosure of loans with governmental agencies. + References No definition available. + Details
Name: | gnss_LoansWithGovernmentalAgenciesTableTextBlock
Namespace Prefix: | gnss_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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