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v3.24.3

Basis of Presentation and Significant Accounting Policies -Additional information (Details) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2024 USD ($) Customer Subsidiary Segment | Sep. 30, 2023 USD ($) Customer | Sep. 30, 2022 USD ($)
Number of wholly owned subsidiaries | Subsidiary | 8 |  |
Number of additional inactive subsidiaries | Subsidiary | 1 |  |
Cash and cash equivalents retained in foreign banks | $ 627,000 |  |
Investments typical final maturity maximum year | 3 years |  |
Investments typical portfolio weighted average maturity month | 18 months |  |
Cash and cash equivalents | $ 4,945,000 | $ 8,665,000 |
Restricted cash | 345,000 | 854,000 |
Allowance for doubtful accounts for expected credit losses | 65,000 | 65,000 |
Inventory Obsolescence Write Down (Recoveries) | (284,000) | 288,000 |
Goodwill impairment charge | 0 | 0 |
Shipping and handling costs | 128,000 | 289,000 |
Cost of revenue | 13,819,000 | 24,901,000 |
Advertising expense | 454,000 | 512,000 |
Warranty reserve | 76,000 | 132,000 | $ 159,000
Impairment of long-lived assets | $ 0 | 0 |
Number of reportable segments | Segment | 2 |  |
Translation gain | $ 152,000 | 207,000 |
Shipping and Handling [Member] |  |  |
Cost of revenue | $ 187,000 | $ 392,000 |
Minimum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 2 years |  |
Estimated useful lives | 3 years |  |
Maximum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 7 years |  |
Estimated useful lives | 15 years |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Number of major customers | Customer | 3 | 3 |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 1 [Member] |  |  |
Concentration risk percentage | 15.00% | 22.00% |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 2 [Member] |  |  |
Concentration risk percentage | 14.00% | 10.00% |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer 3 [Member] |  |  |
Concentration risk percentage | 11.00% | 10.00% |

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