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Stockholders' Equity (Details 3) - Restricted Common Stock [Member] - $ / shares
6 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Jun. 30, 2018
Number of Shares, Outstanding and expected to vest, Beginning balance 2,188
Number of Shares, Issued (938)
Number of Shares, Forfeited (1,250)
Number of Shares, Outstanding and expected to vest, Ending balance  
Weighted Average Fair Value Per Share, Outstanding and vested, Beginning balance $ 61.00
Weighted Average Fair Value Per Share, Issued 61.00
Weighted Average Fair Value Per Share, Forfeited 61.00
Weighted Average Fair Value Per Share, Outstanding and expected to vest, Ending balance