CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended
Apr. 01, 2017	Mar. 26, 2016
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	$ 5,416,400	$ 4,562,900
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX:
Unrealized holding net gains (losses) arising during period	7,600	15,600
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX	7,600	15,600
INCOME TAX (EXPENSE) BENEFIT RELATED TO ITEMS OF OTHER COMPREHENSIVE INCOME:
Unrealized holding net gains/losses arising during period	(2,800)	(5,900)
INCOME TAX (EXPENSE) BENEFIT RELATED TO ITEMS OF OTHER COMPREHENSIVE INCOME	(2,800)	(5,900)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	4,800	9,700
COMPREHENSIVE INCOME	$ 5,421,200	$ 4,572,600

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=51831270

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount before tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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