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Series A Redeemable, Convertible Preferred Stock (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 28, 2012
Dec. 28, 2012
Series A Preferred Stock [Member]
May 24, 2010
Series A Preferred Stock [Member]
Dec. 29, 2007
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized   10,000,000    
Preferred Stock, Shares Outstanding     1,700,000  
Preferred Stock, Description On October 22, 2007, the Board approved the designation of 1,700,000 shares of the preferred stock as Series A Redeemable Convertible Preferred Stock ("Preferred Stock") to be issued in connection with the acquisition of the 50% interest in Canon Staar Co., Inc. which was consummated on December 29, 2007.      
Preferred Stock, Shares Issued       1,700,000
Preferred Stock, Value, Issued       $ 6.8
Preferred stock fair value, per share       $ 4
Preferred Stock Redemption Price     $ 4  
Preferred Stock, Redemption Amount     $ 6.8