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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Accounts receivable, allowance for doubtful accounts $ 41   $ 44
Preferred stock, par value $ 0.001   $ 0.001
Preferred stock, shares authorized 10,000,000   10,000,000
Preferred stock, shares issued 0   0
Preferred stock, shares outstanding 0   0
Common stock, par value $ 0.001   $ 0.001
Common stock, shares authorized 150,000,000   150,000,000
Common stock, shares issued 102,333,000   79,314,000
Common stock, shares outstanding 102,333,000   79,314,000
Series A Preferred Stock      
Preferred stock, par value $ 0.001   $ 0.001
Preferred stock, shares authorized 1,000,000   1,000,000
Preferred stock, shares issued   0 0
Preferred stock, shares outstanding   0 0