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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
STOCKHOLDERS' EQUITY (DEFICIT)    
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.00033 $ 0.00033
Common stock, shares authorized (in shares) 75,000,000 75,000,000
Common stock, shares issued (in shares) 5,278,850 3,417,187
Common stock, shares outstanding (in shares) 5,278,850 3,417,187