Debt (Narrative) (Details)		12 Months Ended
	Dec. 11, 2020 USD ($)	Jan. 31, 2021 USD ($)	Sep. 08, 2020 USD ($)	Feb. 01, 2020 USD ($)
Line of Credit Facility [Line Items]
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%
Interest rate		5.00%
Unused portion fee rate		0.375%
Judgments or judicial actions against the borrowers in excess		$ 250,000
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]
Maximum 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]
Line of Credit Facility [Line Items]
Non-refundable fee			$ 75,000
Amendment No. 21 To Credit Facility [Member] | Consecutive Four Fiscal Quarters Ending July 31, 2020
Line of Credit Facility [Line Items]
Maximum fixed charge coverage ratio			1.00
Amendment No. 21 To Credit Facility [Member] | Consecutive Four Fiscal Quarters Ending October 31, 2020
Line of Credit Facility [Line Items]
Maximum fixed charge coverage ratio			1.00
Amendment No. 21 To Credit Facility [Member] | Consecutive Four Fiscal Quarters Ending Thereafter
Line of Credit Facility [Line Items]
Maximum fixed charge coverage ratio			1.10
Amendment No. 22 To Credit Facility [Member]
Line of Credit Facility [Line Items]
Non-refundable fee	$ 40,000
Minimum coverage ratio	1.10
Amendment No. 22 To Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Covenant compliance, adjusted EBITDA	$ 2,000,000
PNC [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity		$ 21,891,000
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] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		2.75%
Eurodollar [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility bears interest range of		2.25%
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%
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%