Debt (Narrative) (Details)		1 Months Ended	3 Months Ended
	May 19, 2023 USD ($) basisPoint	Aug. 31, 2017 USD ($)	Apr. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Apr. 30, 2022 USD ($)	Sep. 28, 2021 USD ($)
Line of Credit Facility [Line Items]
Maximum dividend amount in fiscal year						$ 3,000,000.0
Line of credit facility, term			$ 15,000,000.0
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%
Long-term debt			$ 34,685,000	$ 21,744,000	$ 33,469,000
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Waiver and amendment fee	$ 50,000
Increase in inventory sublimit under credit agreement	35,000,000
Increase in assemble to ship inventory sublimit under credit agreement	$ 15,000,000
Incremental credit line increase (decrease)	0.0067
Increase (decrease) applicable margin basis points | basisPoint	25
Incremental Credit Line Increase (Decrease)	$ 7,500,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Long-term debt			30,121,000	$ 17,122,000	$ 28,674,000
Original Mortgage Note
Line of Credit Facility [Line Items]
Interest rate		4.00%
Long-term debt			$ 4,600,000
Face amount		$ 5,800,000
Term		20 years
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%
Amended and Restated Credit Agreement | Consecutive Four Fiscal Quarters Ending July 31, 2020
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio						1.2
Equipment Loan [Member] | Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Line of credit facility, equipment financing			$ 2,000,000
PNC [Member] | Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Non-refundable fee						$ 50,000
PNC [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity			16,600,000
PNC [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Line of credit facility, net	$ 72,500,000
PNC [Member] | Revolving Credit Facility [Member] | Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			65,000,000.0
PNC [Member] | Equipment Loan [Member] | Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 10,000,000.0
Alternate Base Rate Loans [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate			9.75%
Alternate Base Rate Loans [Member] | Minimum
Line of Credit Facility [Line Items]
Interest rate			7.65%