XML 14 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Details) (USD $)
3 Months Ended
Mar. 30, 2013
Dec. 29, 2012
Mar. 31, 2012
Debt securities
Mar. 30, 2013
U.S. government and agency backed securities
Dec. 29, 2012
U.S. government and agency backed securities
Mar. 30, 2013
Corporate debt and certificates of deposit
Dec. 29, 2012
Corporate debt and certificates of deposit
Schedule of Available-for-sale Securities [Line Items]              
Amortized Cost $ 98,292,570 $ 65,106,002   $ 74,528,373 $ 38,074,136 $ 23,764,197 $ 27,031,866
Unrealized Gains 500,297 508,820   500,297 508,820 0 0
Unrealized Losses (180,150) (264,860)   0 0 (180,150) (264,860)
Fair Value 98,612,717 65,349,962   75,028,670 38,582,956 23,584,047 26,767,006
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]              
Less than one year 31,044,806     14,006,940   17,037,866  
One to five years 54,032,007     48,432,076   5,599,931  
Greater than five years 13,535,904     12,589,654   946,250  
Other than temporary impairment losses, portion recognized in earnings     $ 200,000