Long-Term Debt - Additional Information (Details) - USD ($)		9 Months Ended
May 06, 2022	Jun. 30, 2022
Debt Instrument [Line Items]
Debt issuance costs		$ 211,000
The Agreement
Debt Instrument [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
Debt issuance costs		200,000
Bborrowing availability		$ 8,500,000
The Agreement \| Prime Rate
Debt Instrument [Line Items]
Interest rate on borrowed funds	4.00%
The Agreement \| Prime Rate \| Minimum
Debt Instrument [Line Items]
Interest rate on borrowed funds	3.25%
The Agreement \| Inventory
Debt Instrument [Line Items]
Borrowing base as percentage of assets	50.00%
Borrowing base as percent of credit towards accounts receivable	100.00%

Amount of line of credit facility remaining borrowing capacity based upon assets

No definition available.

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

- Definition

Line of Credit Facility Borrowing Base as Percent of Assets

+ References

No definition available.

+ Details

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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

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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

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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

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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

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