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Income Taxes
6 Months Ended
Jun. 30, 2020
Income Tax Disclosure [Abstract]  
Income Taxes
11. Income Taxes

The effective income tax rate for the three months ended June 30, 2020 and 2019 was 0.4% and 0.9%, respectively, resulting in a $0.1 million income tax expense in both periods. The effective income tax rate for the six months ended June 30, 2020 and 2019 was 0.7% and 0.0%, respectively, resulting in a $0.3 million and $0.0 million income tax expense, respectively. The Company’s effective income tax rate has fluctuated primarily as a result of the income mix between jurisdictions. 


The income tax expense for the three and six months ended June 30, 2020 and 2019 differs from the amount that would be expected after applying the statutory U.S. federal income tax rate primarily due to pre-tax losses for which no tax benefit can be recorded, and foreign earnings being taxed at rates different than the US statutory rate.