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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Sep. 30, 2021
Significant Accounting Policies [Line Items] |  |  |
Restricted cash on deposit | $ 200,000 | $ 200,000 | $ 0
Cash and cash equivalents held by foreign subsidiaries | 2,600,000 | $ 2,600,000 | 2,600,000
Minimum credit limit |  | 30 days |
Extended credit terms for trade receivables |  | 60 days |
Trade account and financing receivable due | 3,000,000.0 | $ 3,000,000.0 |
Impairment charge | $ 400,000 | 401,000 |
Income tax, Interest or penalties incurred |  | $ 0 | $ 0
Change in accounting principle, accounting standards update, adopted | true | true |
Change in accounting principle, accounting standards update, adoption date | Dec. 31, 2021 | Dec. 31, 2021 |
Change in accounting principle, accounting standards update, immaterial effect | true | true |
Accounting Standards Update [Extensible Enumeration] |  | us-gaap:AccountingStandardsUpdate201912Member |
Emerging Markets |  |  |
Significant Accounting Policies [Line Items] |  |  |
Impairment charges related to long lived assets |  | $ 0 |
Product Concentration Risk | Sales Revenue, Net | Certain Models of Oil and Gas Marine Wireless Products |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of company revenue |  | 11.00% | 0.00%
Product Concentration Risk | Sales Revenue, Net | Thermal Film |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of company revenue |  | 8.00% | 7.00%
Customer one |  |  |
Significant Accounting Policies [Line Items] |  |  |
Trade account and financing receivable due | $ 5,500,000 | $ 5,500,000 | $ 4,900,000
Customer one | Customer Concentration Risk | Sales Revenue, Net |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of company revenue |  | 29.30% | 19.80%
Customer two |  |  |
Significant Accounting Policies [Line Items] |  |  |
Trade account and financing receivable due |  |  | $ 7,400,000
Customer two | Customer Concentration Risk | Sales Revenue, Net |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of company revenue |  |  | 16.40%
Customer three |  |  |
Significant Accounting Policies [Line Items] |  |  |
Trade account and financing receivable due |  |  | $ 1,100,000
Customer three | Customer Concentration Risk | Sales Revenue, Net |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of company revenue |  |  | 10.60%
Russian Federation Subsidiary |  |  |
Significant Accounting Policies [Line Items] |  |  |
Cash and cash equivalents held by foreign subsidiaries |  |  | $ 1,800,000
Geospace Technologies Eurasia LLC |  |  |
Significant Accounting Policies [Line Items] |  |  |
Percentage of ownership interest or majority of voting interests subject to sanctions |  | 33.00% |
Net carrying value of subsidiary | $ 6,000,000.0 | $ 6,000,000.0 |
Revenue from domestic sales |  | 1,900,000 |
Imported product for resale |  | $ 1,900,000 |

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