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Summary of Significant Accounting Policies - Narrative (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2024 USD ($) customer shares | Sep. 30, 2023 USD ($) customer shares | Oct. 31, 2024
Accounting Policies [Line Items] |  |  |  |
Allowance for credit losses | $ 117,000 | $ 117,000 | $ 237,000 |
Accounts receivable, allowance for credit loss, writeoffs |  | 30,000 | 16,000 |
Bad debt expense (benefit) |  | $ 90,000 | $ (194,000) |
Percentage of inventory estimated using LIFO method | 30.00% | 30.00% | 36.00% |
Net realizable value reserves |  | $ 705,000 | $ 669,000 |
Obsolete and excess inventory valuation reserves, net of writedown |  | 2,028,000 | 1,495,000 |
Depreciation expense |  | $ 4,784,000 | $ 4,998,000 |
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares |  | 238,000 | 202,000 |
Valuation allowance | $ 700,000 | $ (2,000,000) | $ (2,534,000) |
Government Assistance, Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Selling, general and administrative expenses |  |
Discontinued Operations, Disposed of by Sale | C Blade | Subsequent event |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Share purchase agreement, percentage to be acquired |  |  |  | 100.00%
Employee Retention Credit Program |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Interest income |  | $ 0 | 84,000 |
Interest expense |  | $ 0 |  |
Gross benefit |  |  | 1,772,000 |
Proceeds from employee retention credit refund |  |  | 1,688,000 |
Cost of goods sold |  |  | 1,452,000 |
Selling, general and administrative expense |  |  | 236,000 |
Professional fees |  |  | $ 354,000 |
Restricted shares |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares |  | 0 |  |
Performance shares |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) | shares |  | 0 |  |
Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Finite-lived intangible asset, useful life (in years) | 1 year | 1 year |  |
Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Finite-lived intangible asset, useful life (in years) | 10 years | 10 years |  |
Building and Building Improvements | Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 5 years | 5 years |  |
Building and Building Improvements | Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 40 years | 40 years |  |
Machinery and Equipment | Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 3 years | 3 years |  |
Machinery and Equipment | Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 20 years | 20 years |  |
Computer Software | Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 3 years | 3 years |  |
Computer Software | Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 7 years | 7 years |  |
Leasehold Improvements | Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 6 years | 6 years |  |
Leasehold Improvements | Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Property, plant and equipment, useful life (in years) | 15 years | 15 years |  |
Customer Concentration Risk | Sales Revenue, Net | Customer One |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 15.00% | 12.00% |
Number of major customers | customer |  | 1 | 2 |
Customer Concentration Risk | Sales Revenue, Net | Customer Two |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  |  | 11.00% |
Customer Concentration Risk | Sales Revenue, Net | Three Customers And Their Direct Subcontractors |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 41.00% | 39.00% |
Number of major customers | customer |  | 3 | 3 |
Customer Concentration Risk | Sales Revenue, Net | Major Customer One and Their Subcontractors |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 15.00% | 13.00% |
Customer Concentration Risk | Sales Revenue, Net | Major Customer Two and Their Subcontractors |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 15.00% | 13.00% |
Customer Concentration Risk | Sales Revenue, Net | Major Customer Three and Their Subcontractors |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 11.00% | 13.00% |
Customer Concentration Risk | Accounts Receivable | Customer One |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  |  | 11.00% |
Number of major customers | customer |  |  | 1 |
Customer Concentration Risk | Accounts Receivable | Three Customers And Their Direct Subcontractors |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Percentage of concentration risk |  | 22.00% | 13.00% |
Number of major customers | customer |  | 2 | 1 |

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