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Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2019 | Mar. 31, 2018
Summary of Significant Accounting Policies |  |
Provision for income taxes | $ (1.4) | $ (2.8)

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- Definition The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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