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Commitments, Contingencies and Subsequent Events (Q2) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Financial Condition and Liquidity [Abstract] |  |  |
Working capital | $ (12.8) | $ 2.9 | $ 2.1

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- References No definition available. + Details
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- Definition A measure of both a entity's efficiency and its short-term financial health. + References No definition available. + Details
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