Fair Value Measurement - Estimated Fair Values of Liabilities Measured on Recurring Basis (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Inputs, Level 1 [Member]
Derivative Liability, Noncurrent	$ 0	$ 0
Fair Value, Inputs, Level 1 [Member] | Derivative liability - Old Warrants
Derivative Liability, Noncurrent	0	0
Fair Value, Inputs, Level 2 [Member]
Derivative Liability, Noncurrent	0	0
Fair Value, Inputs, Level 2 [Member] | Derivative liability - Old Warrants
Derivative Liability, Noncurrent	0	0
Fair Value, Inputs, Level 3 [Member]
Derivative Liability, Noncurrent	0	1,645,606
Fair Value, Inputs, Level 3 [Member] | Derivative liability - Old Warrants
Derivative Liability, Noncurrent	$ 0	$ 1,645,606