Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 2)

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Stockholders' Equity (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended
Sep. 27, 2014
Dec. 28, 2013
Sep. 27, 2014
Maximum
Warrant [Member]
Jul. 16, 2014
GE [Member]
Subsequent Event [Member]
Warrant [Member]
Jul. 16, 2014
GE [Member]
Subsequent Event [Member]
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Warrants outstanding (shares) $ 24        
Exercise price of warrants (usd per share)     $ 3.55   $ 0.73
Number of warrants called (shares)         254,000
Forfeited (shares)       46,651  
Share price (usd per share)         $ 3.99
Common Stock, issued shares (in shares) 5,788,000 5,571,000     207,391
Number of authorized shares of preferred stock 2,000,000