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Note 5 - Trade Accounts and Notes Receivable - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Beginning of period	$ 67	$ 706	$ 125	$ 591
Provision for credit losses	5	16	60	400
Recoveries	(38)	(194)	(144)	(441)
Write-offs	0	(321)	(7)	(327)
Currency translation	1	1	1	(15)
End of period	$ 35	$ 208	$ 35	$ 208

X

- Definition

Amount of currency translation pertaining to accounts receivable, allowance for credit loss.

+ References

No definition available.

+ Details

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Namespace Prefix:	geos_
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Period Type:	duration

X

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

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X

- Definition

Amount of increase in allowance for credit loss on accounts receivable, from recovery.

+ References

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X

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

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X

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

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