XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.21.1

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 13, 2018 | Jul. 27, 2018 | Sep. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Sep. 30, 2020
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |
Contingent earn-out liability |  |  |  | $ 7,720 |  | $ 7,720 |  | $ 10,962
Change in estimated fair value of contingent consideration |  |  |  | (221) | $ 972 | (918) | $ 972 |
Future minimum lease obligations |  |  |  | $ 1,472 |  | $ 1,472 |  |
Maximum |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |
Operating lease term |  |  |  | 7 years |  | 7 years |  |
Quantum |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |
Contingent earn-out liability |  | $ 7,700 |  |  |  |  |  |
Contingent payments earn-out period |  | 4 years |  |  |  |  |  |
Contingent payments earn-out period ending month and year |  | 2022-07 |  |  |  |  |  |
Contingent payments maximum earn-out amount |  | $ 23,500 |  |  |  |  |  |
Contingent earn-out liability |  |  |  |  |  |  |  | 5,800
Change in estimated fair value of contingent consideration |  |  |  |  |  | $ 800 |  |
Estimated fair value of earn-out liability |  |  |  | $ 5,000 |  | 5,000 |  |
Contingent earn-out cash payment |  |  |  |  |  |  |  | 100
Quantum | Scenario Forecast |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |
Contingent earn-out additional payment |  |  | $ 2,300 |  |  |  |  |
Optoseis Technology |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |
Contingent earn-out liability | $ 4,300 |  |  |  |  |  |  |
Contingent payments earn-out period | 5 years 6 months |  |  |  |  |  |  |
Contingent payments earn-out period ending month and year | 2024-05 |  |  |  |  |  |  |
Contingent payments maximum earn-out amount | $ 23,200 |  |  |  |  |  |  |
Contingent earn-out liability |  |  |  |  |  |  |  | $ 5,200
Change in estimated fair value of contingent consideration |  |  |  |  |  | 100 |  |
Estimated fair value of earn-out liability |  |  |  | $ 5,100 |  | $ 5,100 |  |

X
- Definition Business combination contingent consideration additional earn out payment. + References No definition available. + Details
Name: | geos_BusinessCombinationContingentConsiderationAdditionalEarnOutPayment
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business combination contingent consideration cash earn out payment. + References No definition available. + Details
Name: | geos_BusinessCombinationContingentConsiderationCashEarnOutPayment
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

X
- Definition Business combination contingent consideration earn out period end month and year. + References No definition available. + Details
Name: | geos_BusinessCombinationContingentConsiderationEarnOutPeriodEndMonthAndYear
Namespace Prefix: | geos_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- Definition Estimated fair value of earn-out liability. + References No definition available. + Details
Name: | geos_EstimatedFairValueOfEarnOutLiability
Namespace Prefix: | geos_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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