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Research Funding (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2017
May 04, 2017
Feb. 23, 2017
Deferred Revenue Arrangement [Line Items]      
Grants Receivable     $ 12.2
Grants Receivable, Current   $ 5.7  
Grant Revenue Recognized $ 0.7    
Accrued Liabilities [Member]      
Deferred Revenue Arrangement [Line Items]      
Deferred Grant Revenue 1.7    
Other Long-Term Liabilities [Member]      
Deferred Revenue Arrangement [Line Items]      
Deferred Grant Revenue $ 3.2