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Fair Value Measurement - Estimated Fair Value Using Unobservable Inputs (Details)
6 Months Ended
Dec. 31, 2019
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance $ 1,645,606
Additions during the year 0
Change in fair value - transfer in and out of Level (274,449)
Ending Balance $ 1,371,157