Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In order to determine the quarterly provision for income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual income and statutory tax rates in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter during which they occur and can be a source of variability in the effective tax rates from quarter to quarter. The Company’s effective income tax benefit rate for the six months ended June 30, 2019 and 2018 was approximately 0.41% and 0.58%, respectively. Income tax expense for the six months ended June 30, 2019 was affected by year to date projected loss in Canada and estimated minimum state taxes in the US. Both the 2019 and 2018 effective tax rates differ from the statutory rate primarily due to the combination of not benefiting from expected pre-tax US losses, a result of changes to the valuation allowance, and recognizing current state income tax expense for minimum state taxes. Significant judgment is required in determining the Company’s provision for income taxes, recording valuation allowances against deferred tax assets, and evaluating the Company’s uncertain tax positions. In evaluating the ability to realize its deferred tax assets, in full or in part, the Company considers all available positive and negative evidence, including past operating results, forecasted future earnings, and prudent and feasible tax planning strategies. Due to historical net losses incurred and the uncertainty of realizing the deferred tax assets, for all the periods presented, the Company has maintained a domestic valuation allowance against the deferred tax assets that remain after offset by domestic deferred tax liabilities, and the company currently anticipates recording a valuation allowance against net foreign deferred tax assets by the end of the current year.

Income Taxes

In order to determine the quarterly provision for income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual income and statutory tax rates in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter during which they occur and can be a source of variability in the effective tax rates from quarter to quarter.

The Company’s effective income tax benefit rate for the six months ended June 30, 2019 and 2018 was approximately 0.41% and 0.58%, respectively. Income tax expense for the six months ended June 30, 2019 was affected by year to date projected loss in Canada and estimated minimum state taxes in the US. Both the 2019 and 2018 effective tax rates differ from the statutory rate primarily due to the combination of not benefiting from expected pre-tax US losses, a result of changes to the valuation allowance, and recognizing current state income tax expense for minimum state taxes.

Significant judgment is required in determining the Company’s provision for income taxes, recording valuation allowances against deferred tax assets, and evaluating the Company’s uncertain tax positions. In evaluating the ability to realize its deferred tax assets, in full or in part, the Company considers all available positive and negative evidence, including past operating results, forecasted future earnings, and prudent and feasible tax planning strategies. Due to historical net losses incurred and the uncertainty of realizing the deferred tax assets, for all the periods presented, the Company has maintained a domestic valuation allowance against the deferred tax assets that remain after offset by domestic deferred tax liabilities, and the company currently anticipates recording a valuation allowance against net foreign deferred tax assets by the end of the current year.