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Consolidated Balance Sheet (Parenthetical) - $ / shares
Sep. 30, 2019
Sep. 30, 2018
Preferred Stock, par value (in USD per share) $ 0.0001 $ 0.0001
Preferred Stock authorized (shares) 10,000,000 10,000,000
Preferred Stock issued (shares) 0 0
Preferred Stock outstanding (shares) 0 0
Class A Common Stock    
Common Stock, par value (in USD per share) $ 0.0001 $ 0.0001
Common Stock authorized (shares) 150,000,000 150,000,000
Common Stock issued (shares) 14,444,115 9,112,042
Common Stock, outstanding (shares) 14,444,115 9,112,042
Class B Common Stock    
Common Stock, par value (in USD per share) $ 0.0001 $ 0.0001
Common Stock authorized (shares) 40,000,000 40,000,000
Common Stock issued (shares) 12,921,637 17,213,806
Common Stock, outstanding (shares) 12,921,637 17,213,806