CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	$ 12,937,900	$ 14,095,000
Unrealized net gains (losses) on marketable securities:
Unrealized holding net gains (losses) arising during period	(6,500)	28,000
Reclassification adjustment for net gains included in net income	(28,000)
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX	(34,500)	28,000
Unrealized net gains/losses on marketable securities:
Unrealized holding net gains/losses arising during period	2,500	(11,000)
Reclassification adjustment for net gains included in net income	11,000
INCOME TAX (EXPENSE) BENEFIT RELATED TO ITEMS OF OTHER COMPREHENSIVE INCOME	13,500	(11,000)
OTHER COMPREHENSIVE GAIN (LOSS), NET OF TAX	(21,000)	17,000
COMPREHENSIVE INCOME	$ 12,916,900	$ 14,112,000