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Financial Instruments (Fair Value Measurements) (Details) (USD $)
Dec. 28, 2013
Dec. 29, 2012
Total
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets $ 114,162,303 $ 95,660,394
Total | Money Markets and Cash Equivalents
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 16,756,666 27,135,387
Total | U.S. Government Securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 68,284,392 38,582,956
Total | Corporate Debt
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 12,984,331 11,095,227
Total | Certificates of Deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 14,703,812 15,671,779
Total | Advanced Wireless Semiconductor Company
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   1,764,657
Total | WIN Semiconductor Corporation
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   1,410,388
Total | Vuzix
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 1,433,102  
Level 1
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 34,731,771 47,887,310
Level 1 | Money Markets and Cash Equivalents
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 16,756,666 27,135,387
Level 1 | U.S. Government Securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 16,542,003 17,576,878
Level 1 | Corporate Debt
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets      
Level 1 | Certificates of Deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets      
Level 1 | Advanced Wireless Semiconductor Company
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   1,764,657
Level 1 | WIN Semiconductor Corporation
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   1,410,388
Level 1 | Vuzix
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 1,433,102  
Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 79,430,532 47,773,084
Level 2 | Money Markets and Cash Equivalents
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets      
Level 2 | U.S. Government Securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 51,742,389 21,006,078
Level 2 | Corporate Debt
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 12,984,331 11,095,227
Level 2 | Certificates of Deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 14,703,812 15,671,779
Level 2 | Advanced Wireless Semiconductor Company
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets     
Level 2 | WIN Semiconductor Corporation
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets     
Level 2 | Vuzix
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0  
Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0 0
Level 3 | Money Markets and Cash Equivalents
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0 0
Level 3 | U.S. Government Securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0 0
Level 3 | Corporate Debt
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0 0
Level 3 | Certificates of Deposit
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets 0 0
Level 3 | Advanced Wireless Semiconductor Company
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   0
Level 3 | WIN Semiconductor Corporation
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets   0
Level 3 | Vuzix
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurements of financial assets $ 0