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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 |  |  |  |

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