XML 70 R58.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Fair Value of Financial Instruments - Changes in Fair Value of Company Level 3 Financial Instruments (Details) - Nonrecurring - Significant Unobservable (Level 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |
Balance | $ 6,017 | $ 10,962
Fair value adjustments | (5,035) | (3,524)
Payment of contingent consideration | (807) | (1,421)
Balance | $ 175 | $ 6,017

X
- Definition Fair value measurement with unobservable inputs reconciliation nonrecurring basis liability fair value adjustments. + References No definition available. + Details
Name: | geos_FairValueMeasurementWithUnobservableInputsReconciliationNonrecurringBasisLiabilityFairValueAdjustments
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value measurement with unobservable inputs reconciliations nonrecurring basis liability value. + References No definition available. + Details
Name: | geos_FairValueMeasurementWithUnobservableInputsReconciliationsNonrecurringBasisLiabilityValue
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payment of contingent consideration. + References No definition available. + Details
Name: | geos_PaymentOfContingentConsideration
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |