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Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Tax Disclosure [Abstract]            
Income taxes $ 0   $ 0   $ 0 $ 0
Net loss $ 12,367,000 $ 14,672,000 $ 2,334,000 $ 16,530,000 $ 27,039,000 $ 18,864,000