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Commitments and Contingencies - Other Agreements (Details) - USD ($)
1 Months Ended 6 Months Ended 15 Months Ended
May 31, 2019
May 31, 2016
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Other Agreements          
Total rent expense under operating classified lease     $ 52,000 $ 52,000 $ 26,000
Office Rental          
Other Agreements          
Total rent expense under operating classified lease $ 8,900 $ 8,400