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Commitments and Contingencies (Details) - USD ($) | Mar. 31, 2020 | Aug. 01, 2017
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Clean Air Act Violation |  |
Loss Contingencies [Line Items] |  |
Fine payable due to plea agreement | $ 1,000,000 |
EPA Administrative Civil Penalty |  |
Loss Contingencies [Line Items] |  |
Loss contingency, estimate of possible loss |  | $ 250

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