Debt (Narrative) (Details)	9 Months Ended
	Oct. 31, 2021 USD ($)	Dec. 07, 2021 USD ($)	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
Revolving credit facility bears interest increased	2.00%
Unused portion fee rate	0.375%
Debt Instrument Covenant Period, Two
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio	1.00
Debt Instrument Covenant Period, Two | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio		1.00
Debt Instrument Covenant Period, Thereafter
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio	1.10
Debt Instrument Covenant Period, Thereafter | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio		1.10
Debt Instrument Covenant Period, One
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio	1.10
Debt Instrument Covenant Period, One | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio		1.10
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. 20 To Credit Facility [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio	1.10
Amendment No. 20 To Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Maximum capital expenditures	$ 8,000,000
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
Amendment No. 22 To Credit Facility [Member]
Line of Credit Facility [Line Items]
Non-refundable fee	50,000
Amendment No. 22 To Credit Facility [Member] | Subsequent Event [Member]
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	13,741,000
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
Line of credit facility, Equipment financing	$ 2,000,000
Eurodollar [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of	2.25%
Eurodollar [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of	2.75%
Alternate Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Interest rate	4.50%
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of	1.25%
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of	1.75%