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

Business combination contingent consideration earn-out period.

No definition available.

Name:	geos_BusinessCombinationContingentConsiderationEarnOutPeriod
Namespace Prefix:	geos_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration