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Debt (Narrative) (Details) | 3 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2022 USD ($) | Oct. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Aug. 31, 2022 USD ($) | Jul. 31, 2022 USD ($) | Apr. 15, 2022 USD ($) | Dec. 07, 2021 | Sep. 28, 2021
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum amount outstanding during period | $ 3,000,000 |  |  |  |  |  |  |
Line Of Credit Facility, Borrowing Capacity, Term | $ 15,000,000 |  |  |  |  |  |  |
Line of credit facility, period for reduced borrowings during fourth quarter of each fiscal year (consecutive days) | 30 days |  |  |  |  |  |  |
Unused portion fee rate | 0.375% |  |  |  |  |  |  |
Inventory [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Revolving credit facility borrowing base limitation | 60.00% |  |  |  |  |  |  |
Inventories [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Revolving credit facility borrowing base limitation | 85.00% |  |  |  |  |  |  |
Maximum [Member] | Accounts receivable [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Revolving credit facility borrowing base limitation | 85.00% |  |  |  |  |  |  |
Amendment No. 21 To Credit Facility [Member] | Consecutive Four Fiscal Quarters Ending July 31, 2020 |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Minimum fixed charge coverage ratio |  |  |  |  |  |  |  | 1.2
Amended And Restated Revolving Credit And Security Agreement, Number 2 |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Extension fee |  |  |  |  |  | $ 250,000 |  |
Waiver and amendment fee |  |  |  |  |  | 75,000 |  |
Extension fee and waiver and amendment fee due at closing |  |  |  |  |  | 200,000 |  |
Extension fee and waiver and amendment fee due at first anniversary of closing |  |  |  |  |  | $ 125,000 |  |
Amended And Restated Revolving Credit And Security Agreement, Number 2 | Consecutive Four Fiscal Quarters Ending July 31, 2020 |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Minimum fixed charge coverage ratio |  |  |  |  |  |  | 1.00 |
Revolving Credit Facility [Member] | Amended And Restated Revolving Credit And Security Agreement, Number 2 | Forecast |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 45,000,000 | $ 40,000,000 | $ 70,000,000 | $ 65,000,000 |  |  |
PNC [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Remaining borrowing capacity | $ 11,699,000 |  |  |  |  |  |  |
PNC [Member] | Revolving Credit Facility [Member] | Amendment No. 19 to Credit Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | 65,000,000 |  |  |  |  |  |  |
PNC [Member] | Equipment Loan [Member] | Amendment No. 19 to Credit Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 10,000,000 |  |  |  |  |  |  |
Alternate Base Rate Loans [Member] |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Interest rate | 5.25% |  |  |  |  |  |  |

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