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Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes (Details) [Line Items]
Federal income tax rate	21.00%	21.00%	34.00%
Revised income tax rate			21.00%
Estimated income tax expenses revaluation of deferred tax assets and liabilities			$ 1.1
Tax expense	$ 1.1
Income tax benefit	0.9	$ 0.6
Percentage of deemed dividends			3.00%
Net of recovery taxes and excluding interest and penalties	$ 5.8
Ministry of the Economy, Finance and Industry, France [Member]
Income Taxes (Details) [Line Items]
Percentage of deemed dividends	3.00%
Income tax refund			$ 3.9
Accrued interest on income tax			$ 0.4

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Estimated income tax expenses revaluation of deferred tax assets and liabilities.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences derived regulatory assets and liabilities.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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