Note 6 - Long-term Debt and Note Payable to Bank (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Aug. 30, 2013	Apr. 30, 2014	Oct. 31, 2013	Aug. 29, 2013
Commercial Loan [Member]
Note 6 - Long-term Debt and Note Payable to Bank (Details) [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period		$ 9.0
Debt Instrument, Description of Variable Rate Basis	LIBOR
Debt Instrument, Basis Spread on Variable Rate	2.20%
Line of Credit Facility, Interest Rate at Period End				2.35%
Line of Credit Facility, Amount Outstanding			2.5	3.0
Line of Credit Facility, Remaining Borrowing Capacity			6.5	6.0
Certain Receivables Aged Ninety Days or Over [Member]
Note 6 - Long-term Debt and Note Payable to Bank (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category used for Calculation		85.00%
Line of Credit Facility, Maximum Borrowing Capacity, Maximum Aging Of Receivables		90 days
Certain Foreign Receivables [Member]
Note 6 - Long-term Debt and Note Payable to Bank (Details) [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	$ 1.0
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category used for Calculation	35.00%
Certain Raw Materials of Inventory [Member]
Note 6 - Long-term Debt and Note Payable to Bank (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Related Category used for Calculation	25.00%
Virginia Real Estate Loan [Member]
Note 6 - Long-term Debt and Note Payable to Bank (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.25%