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Note 11 - Summary of Securities (Details) - USD ($) $ in Thousands	Dec. 24, 2016	Sep. 24, 2016
Held to Maturity - Amortized Cost	$ 112,042	$ 104,271
Held to Maturity - Gross Unrealized Gains	218	745
Held to Maturity - Gross Unrealized Losses	287	138
Held to Maturity - Fair Market Value	111,973	104,878
Available for Sale - Amortized Cost	29,794	29,794
Available for Sale - Gross Unrealized Gains	115	273
Available for Sale - Gross Unrealized Losses	547	602
Available for Sale - Fair Market Value	29,362	29,465
Corporate Bond Securities [Member]
Held to Maturity - Amortized Cost	111,082	103,311
Held to Maturity - Gross Unrealized Gains	212	734
Held to Maturity - Gross Unrealized Losses	287	138
Held to Maturity - Fair Market Value	111,007	103,907
Mutual Funds [Member]
Available for Sale - Amortized Cost	13,003	13,003
Available for Sale - Gross Unrealized Gains
Available for Sale - Gross Unrealized Losses	400	520
Available for Sale - Fair Market Value	12,603	12,483
Certificates of Deposit [Member]
Held to Maturity - Amortized Cost	960	960
Held to Maturity - Gross Unrealized Gains	6	11
Held to Maturity - Gross Unrealized Losses
Held to Maturity - Fair Market Value	966	971
Preferred Stock [Member]
Available for Sale - Amortized Cost	16,791	16,791
Available for Sale - Gross Unrealized Gains	115	273
Available for Sale - Gross Unrealized Losses	147	82
Available for Sale - Fair Market Value	$ 16,759	$ 16,982

X

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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+ References

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-Publisher FASB
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Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Available-for-Sale Securities
-URI http://asc.fasb.org/extlink&oid=6505594

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Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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