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Commitments and Contingencies (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 08, 2018
USD ($)
Nov. 06, 2017
item
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2017
USD ($)
Aug. 24, 2018
USD ($)
Jun. 30, 2018
USD ($)
Loss Contingencies [Line Items]                  
Loss Contingency, Number of Additional Defendants Added | item   2              
Litigation Settlement, Amount Awarded to Other Party $ 2,700,000                
Gain (Loss) Related to Litigation Settlement             $ (2,700,000)    
Escrow Deposit               $ 2,700,000  
Rental expense     $ 43,000 $ 43,000 $ 84,000 $ 86,000      
Accrued Expenses, Current [Member]                  
Loss Contingencies [Line Items]                  
Loss Contingency Accrual             $ 2,700,000   $ 2,700,000