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4. Debt (Details) - USD ($)
$ in Thousands
9 Months Ended
Oct. 02, 2015
Dec. 31, 2014
Sep. 26, 2014
Jun. 27, 2014
Debt Instrument, Covenant Description One of the covenants requires Spitz to maintain tangible net worth of at least $6,000 measured upon issuance of quarterly and annual financial statements      
Spitz, Inc.        
Tangible Net Worth   $ 5,744 $ 5,801 $ 5,914