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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 |  |

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