Income Taxes	3 Months Ended
Mar. 31, 2018
Income Taxes
Income Taxes	8. Income Taxes The effective tax rate for the three months ended March 31, 2018 was minimal, compared to 0.1% for the same period in 2017. Should we continue to generate taxable income in 2018, we expect that the taxable income will be substantially offset by the utilization of net operating losses or other deferred tax assets. The difference between the consolidated effective income tax rate and the U.S. federal statutory rate is primarily attributable to a change in valuation allowance against net deferred tax assets.

Income Taxes

3 Months Ended

Mar. 31, 2018

8. Income Taxes

The effective tax rate for the three months ended March 31, 2018 was minimal, compared to 0.1% for the same period in 2017. Should we continue to generate taxable income in 2018, we expect that the taxable income will be substantially offset by the utilization of net operating losses or other deferred tax assets. The difference between the consolidated effective income tax rate and the U.S. federal statutory rate is primarily attributable to a change in valuation allowance against net deferred tax assets.