Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 26, 2015
Dec. 27, 2014
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts, accounts receivable $ 1 $ 172
Preferred stock, shares authorized 2,000,000 2,000,000
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares outstanding 0 0
Common stock, shares authorized 50,000,000 50,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares outstanding 26,701,871 26,572,774