Note 12 - Contingencies (Detail) (USD $)	0 Months Ended	6 Months Ended	12 Months Ended				12 Months Ended										1 Months Ended
	Jan. 05, 2011	Mar. 31, 2012	Sep. 29, 2012	Oct. 01, 2011	Oct. 02, 2010	Nov. 19, 2007	Sep. 29, 2012 Severance Agreement [Member] Health And Welfare Benefits [Member] Chief Executive Officer And Chief Financial Officer [Member]	Sep. 29, 2012 Severance Agreement [Member] Health And Welfare Benefits [Member] Key Members Of Management [Member]	Sep. 29, 2012 Severance Agreement [Member] Chief Executive Officer And Chief Financial Officer [Member]	Sep. 29, 2012 Severance Agreement Renewal [Member] Chief Executive Officer And Chief Financial Officer [Member]	Sep. 29, 2012 Change In Control Agreement [Member] Health And Welfare Benefits [Member] Chief Executive Officer And Chief Financial Officer [Member]	Sep. 29, 2012 Change In Control Agreement [Member] Compensation [Member] Key Members Of Management [Member]	Sep. 29, 2012 Change In Control Agreement [Member] Bonus [Member] Key Members Of Management [Member]	Sep. 29, 2012 Change In Control Agreement [Member] Chief Executive Officer And Chief Financial Officer [Member]	Sep. 29, 2012 Change In Control Agreement [Member]	Sep. 29, 2012 Change In Control Agreement Renewal [Member]	Nov. 19, 2007 Damages Assessed Against DSI [Member]	Nov. 19, 2007 Damages Allegedly Incurred by DSI [Member]	Sep. 29, 2012 Purchase Commitment [Member]
Operating Leases, Rent Expense			$ 908,000	$ 1,500,000	$ 889,000
Operating Leases, Future Minimum Payments Due			813,000
Operating Leases, Future Minimum Payments, Due in Two Years			607,000
Operating Leases, Future Minimum Payments, Due in Three Years			317,000
Operating Leases, Future Minimum Payments, Due in Four Years			45,000
Operating Leases, Future Minimum Payments, Due Thereafter			364,000
Purchase Commitment, Remaining Minimum Amount Committed			34,600,000																4,000,000
Purchase Commitment, Description			100
Loss Contingency, Damages Sought, Value																	8,300,000	2,700,000
Accounts Receivable, Gross, Current			43,261,000	42,732,000		1,400,000
Loss Contingency, Damages Awarded, Value	600,000
Payments for Legal Settlements		$ 600,000			$ 1,500,000
Guarantor Obligations, Term							eighteen	one	two	one	two	severance benefits equal to one times base compensation	one times the average bonus		two	one
Guarantor Obligations, Triggering Event														termination within two years of a change of control