Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]
Number of shares excluded from the computation of net loss per share	32,803,931	23,250,163
Foreign currency translation adjustment	$ 7.8		$ 9.1
Cost of government contracts revenue		$ 2.5
Government Contract Receivable, Unbilled Amounts	0.9
Reclassified from Other Non-Current Assets to Restricted Cash	$ 0.9
Convertible Debt Securities [Member]
Summary of Significant Accounting Policies [Line Items]
Number of shares excluded from the computation of net loss per share	47,716,900