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Organization and Basis of Presentation Liquidity (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016
Procurement Contract [Line Items]
Reduced holdback amount		$ 40.9
Scenario, Forecast | BARDA Contract
Procurement Contract [Line Items]
Reduced holdback amount	$ 41.0

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- Definition

Procurement Contract [Line Items]

+ References

No definition available.

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- Definition

Reduced holdback be received from BARDA

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No definition available.

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- Details

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- Details

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