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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 |  |

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