Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.19.1
Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Summary Of Significant Accounting Policies [Line Items]        
Revenues From Grants $ 0 $ 37,000 $ 44,000  
Work in process 0 0   $ 0
Contract with Customer, Asset, Net, Current $ 0 $ 0   $ 0
Intellectual Property [Member] | Minimum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Finite-Lived Intangible Assets, Remaining Amortization Period   16 years    
Intellectual Property [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Finite-Lived Intangible Assets, Remaining Amortization Period   23 years