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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2019
Sep. 30, 2019
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0 $ 0
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, no par value $ 0 $ 0
Common stock, shares authorized 125,000,000 125,000,000
Common stock, shares issued 33,039,126 31,413,287
Common stock, shares outstanding 33,039,126 31,413,287
Common stock, warrants issued 1,988,472 3,600,953
Common stock, warrants outstanding 1,988,472 3,600,953