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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 28, 2019
Dec. 29, 2018
Accounts receivable, allowance for doubtful accounts $ 43 $ 39
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 300,000,000 300,000,000
Common stock, shares issued 154,097,000 139,283,000
Common stock, shares outstanding 154,097,000 139,283,000
Series A Preferred Stock    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 1,000,000 1,000,000