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Note 7 - Rental Equipment (Tables) | 3 Months Ended
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Dec. 31, 2024
Notes Tables |
Property, Plant, and Equipment, Lessor Asset under Lease [Table Text Block] |
|  | December 31, 2024 |  |  | September 30, 2024 |
Rental equipment, primarily wireless recording equipment |  | $ | 49,220 |  |  | $ | 63,111 |
Accumulated depreciation |  |  | (36,740 | ) |  |  | (48,925 | )
|  | $ | 12,480 |  |  | $ | 14,186 |

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- Definition Tabular disclosure of lessor's underlying asset for which right to use has been conveyed to lessee under lease. + References No definition available. + Details
Name: | geos_PropertyPlantAndEquipmentLessorAssetUnderLeaseTableTextBlock
Namespace Prefix: | geos_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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