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Leases (Narrative) (Details) $ in Millions	Mar. 31, 2019 USD ($) lease	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ (663.0)	$ (656.3)	$ (656.8)
Number of leases for property that had not yet commenced | lease	1
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit		$ 0.5

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- Definition

Lessee, Operating Lease, Lease Not yet Commenced, Number of Leases

+ References

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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