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Liabilities (Details Textual)
 1 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Jun. 22, 2010
USD ($)
Mar. 31, 2007
USD ($)
Dec. 31, 2007
USD ($)
Dec. 28, 2012
USD ($)
Dec. 30, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 28, 2012
CHE
Dec. 28, 2012
JPY (¥)
Dec. 30, 2011
JPY (¥)
Jun. 01, 2009
USD ($)
Apr. 13, 2009
USD ($)
Line of Credit Facility, Maximum Borrowing Capacity       $ 5,800,000       ¥ 500,000,000      
Line of Credit Facility, Interest Rate Description       (approximately 1.475% as of December 28, 2012) and may be renewed annually (the current line expires on March 28, 2013).              
Line of Credit Facility, Amount Outstanding       5,800,000 2,600,000       200,000,000    
Line of Credit Facility, Remaining Borrowing Capacity               0      
Line of Credit Facility, Current Borrowing Capacity       1,096,000     1,000,000        
Notes Payable                     5,000,000
Repayment of notes payable       0 0 5,000,000          
Repayments Of Notes Payable Interest 322,000                    
Loss on early extinguishment of note payable 267,000     0 0 (267,000)          
Incremental Common Shares Attributable to Call Options and Warrants   70,000 700,000 0 585 0          
Investment Warrants, Exercise Price   $ 6 $ 4                
Warrants and Rights Outstanding                   700,000  
Warrants Outstanding Value                   290,000  
Debt Instrument Amortized Discount           236,000          
Warrants Not Settleable in Cash, Fair Value Disclosure       27,000 362,000            
Warrants   70,000 700,000 0 585 0          
Interest Rate In Case Of Default       14.00%              
Percentage Of Commission On Outstanding Notes Payable       0.25%              
Warrant Issued Under Non Compliance       870,000              
Other Expenses         335,000            
Additional Discount On Loan Description       The fair value of the warrants was treated as an additional discount on the loan and was being amortized using the effective interest method over the life of the loan (which approximates an effective interest rate of 32% per annum, assuming the 20% cash interest rate is maintained throughout the life of the Note).              
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants   $ 4,000,000                  
Additional Warrants Issued During Period       30,000