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Commitments and Contingencies - Additional Information (Details) | Jul. 02, 2021
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Aquana, LLC |
Commitments And Contingencies [Line Items] |
Contingent cash payments earn-out period | 6 years

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- Definition Business combination contingent consideration earn-out period. + References No definition available. + Details
Name: | geos_BusinessCombinationContingentConsiderationEarnOutPeriod
Namespace Prefix: | geos_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Commitments and contingencies. + References No definition available. + Details
Name: | geos_CommitmentsAndContingenciesLineItems
Namespace Prefix: | geos_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=geos_AquanaLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |