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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 29, 2012
Dec. 31, 2011
Sep. 24, 2011
Debt securities
Sep. 24, 2011
Debt securities
Sep. 29, 2012
U.S. government and agency backed securities
Dec. 31, 2011
U.S. government and agency backed securities
Sep. 29, 2012
Corporate debt and certificates of deposit
Dec. 31, 2011
Corporate debt and certificates of deposit
Schedule of Available-for-sale Securities [Line Items]                
Amortized Cost $ 69,100,203 $ 62,360,199     $ 38,104,940 $ 31,480,482 $ 30,995,263 $ 30,879,717
Unrealized Gains 580,067 665,171     580,067 665,171 0 0
Unrealized Losses (406,274) (701,983)     0 0 (406,274) (701,983)
Fair Value 69,273,996 62,323,387     38,685,007 32,145,653 30,588,989 30,177,734
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]                
Less than one year 31,589,697       11,039,060   20,550,637  
One to five years 30,353,863       21,216,761   9,137,102  
Greater than five years 7,330,436       6,429,186   901,250  
Other than temporary impairment losses, portion recognized in earnings     $ 200,000 $ 200,000