Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Taxes        
Income tax expense or benefit $ 0 $ 0 $ 0 $ 0
Unrecognized tax benefits liability $ 0 $ 0 $ 0 $ 0