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Income Taxes - Reconciliation of Income Tax Computed at U.S. Statutory Rate to Effective Income Tax Rate (Details)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Tax Disclosure [Abstract]    
Expected U.S. federal incomes as statutory rate 21.00% 21.00%
Change in deferred tax asset valuation allowance (21.10%) 0.00%
State and local income taxes, net of federal benefit (0.30%) (1.30%)
Permanent differences 0.00% (0.60%)
Other 0.00% (0.80%)
Effective tax rate (0.40%) 18.30%