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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 |  |  |  |  |  |  |

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