Subsequent Event - Additional Information (Details) - Subsequent Event - The Agreement	May 06, 2022 USD ($)
Subsequent Event [Line Items]
Maximum amount of borrowing based upon assets	$ 10,000,000
Borrowing base as percentage of loan to value of property	70.00%
Borrowing base as percentage of forced liquidation value of equipment	50.00%
Borrowing base as percentage of assets	80.00%
Agreement term	2 years
Minimum consolidated tangible net worth	$ 100,000,000
Prime Rate
Subsequent Event [Line Items]
Interest rate on borrowed funds	4.00%
Prime Rate \| Minimum
Subsequent Event [Line Items]
Interest rate on borrowed funds	3.25%
Inventory
Subsequent Event [Line Items]
Borrowing base as percentage of assets	50.00%
Borrowing base as percent of credit towards accounts receivable	100.00%

Line of Credit Facility Borrowing Base as Percent of Assets

No definition available.

Name:	geos_LineOfCreditFacilityBorrowingBaseAsPercentOfAssets
Namespace Prefix:	geos_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility borrowing base as percent of credit towards accounts receivable.

+ References

No definition available.

+ Details

Name:	geos_LineOfCreditFacilityBorrowingBaseAsPercentOfCreditTowardsAccountsReceivable
Namespace Prefix:	geos_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility borrowing base as percent of forced liquidation value of equipment.

+ References

No definition available.

+ Details

Name:	geos_LineOfCreditFacilityBorrowingBaseAsPercentOfForcedLiquidationValueOfEquipment
Namespace Prefix:	geos_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility borrowing base as percent of loan to value of property.

+ References

No definition available.

+ Details

Name:	geos_LineOfCreditFacilityBorrowingBaseAsPercentOfLoanToValueOfProperty
Namespace Prefix:	geos_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum Amount Of Line Of Credit Facility Borrowing Based Upon Assets

+ References

No definition available.

+ Details

Name:	geos_MaximumAmountOfLineOfCreditFacilityBorrowingBasedUponAssets
Namespace Prefix:	geos_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum consolidated tangible net worth.

+ References

No definition available.

+ Details

Name:	geos_MinimumConsolidatedTangibleNetWorth
Namespace Prefix:	geos_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=geos_TheAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_InventoriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: