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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 |  |  |  |  |

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