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v3.19.1

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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