Debt (Narrative) (Details)	12 Months Ended
	Jan. 31, 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 USD ($)
Restated Credit Agreement | PNC
Line of Credit Facility [Line Items]
Credit agreement, dividends or payment on capital stock limit								$ 3,000,000
Trailing fixed charge coverage ratio related to capital stock transactions								1.20
Non-refundable fee								$ 50,000
Restated Credit Agreement | Revolving credit facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 65,000,000
Borrowing base limitation, advances as a percentage of eligible inventory component	60.00%
Borrowing base limitation, advances as a percentage of liquidation value of inventory component	85.00%
Additional capacity for January through July	$ 15,000,000
Rate increase in event of default (percent)	2.00%
Interest rate (percent)	5.00%
Fee on unused portion of revolving line of credit (percent)	0.375%
Remaining borrowing capacity	$ 20,449,000
Restated Credit Agreement | Revolving credit facility | Maximum
Line of Credit Facility [Line Items]
Borrowing base limitation, advances as a percentage of eligible accounts receivable	85.00%
Restated Credit Agreement | Revolving credit facility | Alternative Base Rate | Maximum
Line of Credit Facility [Line Items]
Applicable margin (percent)	1.75%
Restated Credit Agreement | Revolving credit facility | Alternative Base Rate | Minimum
Line of Credit Facility [Line Items]
Applicable margin (percent)	1.25%
Restated Credit Agreement | Revolving credit facility | LIBOR | Maximum
Line of Credit Facility [Line Items]
Applicable margin (percent)	2.75%
Restated Credit Agreement | Revolving credit facility | LIBOR | Minimum
Line of Credit Facility [Line Items]
Applicable margin (percent)	2.25%
Restated Credit Agreement | Equipment loan
Line of Credit Facility [Line Items]
Equipment loan	$ 2,000,000
Restated Credit Agreement | Fourth quarter of fiscal year | Revolving credit facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 10,000,000
Period for reduced borrowings during fourth quarter of each fiscal year (consecutive days)	30 days
Restated Credit Agreement | Consecutive four fiscal quarters ending October 31, 2021
Line of Credit Facility [Line Items]
Fixed charge coverage ratio							1.10
Restated Credit Agreement | Consecutive four fiscal quarters ending January 31, 2022 and April 30, 2022
Line of Credit Facility [Line Items]
Fixed charge coverage ratio							1.00
Restated Credit Agreement | Consecutive four fiscal quarters after April 30, 2022
Line of Credit Facility [Line Items]
Fixed charge coverage ratio							1.10
Amended And Restated Revolving Credit And Security Agreement, No. 2 | Revolving credit facility | Forecast
Line of Credit Facility [Line Items]
Borrowing capacity		$ 45,000,000	$ 40,000,000	$ 70,000,000	$ 65,000,000
Amended And Restated Revolving Credit And Security Agreement, No. 2 | Consecutive four fiscal quarters ending January 31, 2022
Line of Credit Facility [Line Items]
Fixed charge coverage ratio							1.00
Amended And Restated Revolving Credit And Security Agreement, No. 2 | Subsequent Event
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