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Note 10 - Employee Benefit Plans - Projected Benefit Obligation Reconciliation (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015 | Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015
Pension Plan [Member] |  |  |  |  |  |
Benefit obligation |  | $ 3,463,000 | $ 3,078,000 |  |  |
Interest cost |  | 147,000 | 130,000 |  |  |
Actuarial (gain) loss |  | 324,000 | 514,000 |  |  |
Plan settlement |  | 290,000 |  |  |  |
Distributions |  | (4,224,000) | (259,000) |  |  |
Benefit obligation |  |  | 3,463,000 |  |  |
Fair value of plan assets | $ 0 | 2,201,000 | 2,253,000 |  |  |
Actual return on plan assets |  | 104,000 | (27,000) |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | 1,919,000 | 234,000 |  |  |
Plan settlement |  | (4,003,000) |  |  |  |
Distributions |  | (221,000) | (259,000) |  |  |
Fair value of plan assets |  | 0 | 2,201,000 |  |  |
Funded status |  |  |  |  |  | $ (1,263,000)
Net amount recognized |  |  |  |  |  | (1,263,000)
Accrued benefit liability |  |  |  |  |  | (1,263,000)
Accumulated other comprehensive loss (net of tax) |  |  |  |  |  | 1,197,000
Net amount recognized |  |  |  |  |  | (66,000)
Unrecognized net loss |  |  |  |  |  | 1,930,000
Net amount recognized |  |  |  |  |  | 1,930,000
Net loss |  | 685,000 | 723,000 |  |  |
Amortization of net loss |  | (76,000) | (53,000) |  |  |
Settlement loss |  | (2,539,000) |  |  |  |
Total recognized in other comprehensive income (loss) |  | (1,930,000) | 670,000 |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0 | 2,201,000 |  | $ 0 | 2,201,000
Supplemental Employee Retirement Plan [Member] |  |  |  |  |  |
Benefit obligation | 9,159,000 | 7,821,000 | 7,480,000 |  |  |
Service cost | 344,000 | 263,000 | 287,000 |  |  |
Interest cost | 338,000 | 326,000 | 323,000 |  |  |
Actuarial (gain) loss | (162,000) | 1,039,000 | 21,000 |  |  |
Distributions | (290,000) | (290,000) | (290,000) |  |  |
Benefit obligation | 9,389,000 | 9,159,000 | 7,821,000 |  |  |
Fair value of plan assets |  |  |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 290,000 | 290,000 | 290,000 |  |  |
Distributions | (290,000) | (290,000) | (290,000) |  |  |
Fair value of plan assets |  |  |  |  |  |
Funded status |  |  |  | $ (9,389,000) | (9,159,000) | (7,821,000)
Net amount recognized |  |  |  | (9,389,000) | (9,159,000) | (7,821,000)
Unrecognized net loss |  |  |  | 2,149,000 | 2,485,000 | 1,531,000
Net amount recognized |  |  |  | 2,149,000 | 2,485,000 | 1,531,000
Net loss | (162,000) | 1,039,000 | 21,000 |  |  |
Amortization of net loss | (174,000) | (85,000) | (117,000) |  |  |
Total recognized in other comprehensive income (loss) | (336,000) | 954,000 | (96,000) |  |  |
Defined Benefit Plan, Fair Value of Plan Assets |  |  |  |  |  |

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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