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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($)
Mar. 26, 2016
Dec. 27, 2014
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis $ 63,261,826 $ 61,120,471
Unrealized Gains 61,467 0
Unrealized Losses (74,980) (177,580)
Fair Value 63,248,313 60,942,891
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Less than one year 31,730,593  
One to five years 26,720,087  
Greater than five years 4,797,633  
Available-for-sale Securities 63,248,313  
U.S. government and agency backed securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 46,664,124 46,586,224
Unrealized Gains 61,467 0
Unrealized Losses 0 (121,561)
Fair Value 46,725,591 46,464,663
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Less than one year 17,594,525  
One to five years 24,333,433  
Greater than five years 4,797,633  
Available-for-sale Securities 46,725,591  
Corporate debt and certificates of deposit    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 16,597,702 14,534,247
Unrealized Gains 0 0
Unrealized Losses (74,980) (56,019)
Fair Value 16,522,722 $ 14,478,228
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Less than one year 14,136,068  
One to five years 2,386,654  
Greater than five years 0  
Available-for-sale Securities $ 16,522,722