Risks and Uncertainties - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2022 USD ($) Customer	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Customer	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Concentration Risk [Line Items]
Trade accounts and financing receivables	$ 3,800,000		$ 3,800,000
Revenue	13,463,000	$ 17,679,000	$ 48,060,000	$ 66,005,000
Geospace Technologies Eurasia LLC
Concentration Risk [Line Items]
Percentage of ownership interest or majority of voting interests subject to sanctions			33.00%
Imported product for resale.					$ 1,200,000
Net carrying value of subsidiary	6,700,000		$ 6,700,000
Cash	1,400,000		1,400,000
Revenue from domestic sales			1,200,000		$ 1,800,000
Customer one
Concentration Risk [Line Items]
Trade accounts and financing receivables	11,400,000		11,400,000
Customer two
Concentration Risk [Line Items]
Trade accounts and financing receivables	3,800,000		3,800,000
Customer three
Concentration Risk [Line Items]
Trade accounts and financing receivables	$ 3,100,000		$ 3,100,000
Customer Concentration Risk
Concentration Risk [Line Items]
Number of customers | Customer	3		3
Sales Revenue, Net | Customer Concentration Risk
Concentration Risk [Line Items]
Number of customers | Customer	3		3
Sales Revenue, Net | Trade Accounts and Financing Receivables | Customer Concentration Risk | Customer one
Concentration Risk [Line Items]
Revenue	$ 3,900,000		$ 19,700,000
Sales Revenue, Net | Trade Accounts and Financing Receivables | Customer Concentration Risk | Customer two
Concentration Risk [Line Items]
Revenue	700,000		5,700,000
Sales Revenue, Net | Trade Accounts and Financing Receivables | Customer Concentration Risk | Customer three
Concentration Risk [Line Items]
Revenue	$ 0		$ 900,000