Income Taxes	9 Months Ended
Sep. 29, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax provision for the three and nine months ended September 29, 2019, was $0.3 million, or an effective tax rate of (0.9)%, and $0.9 million, or an effective tax rate of (0.8)%, respectively. The income tax provision for the three and nine months ended September 30, 2018, was $0.2 million, or an effective tax rate of (1.7)%, and $0.8 million, or an effective tax rate of (2.3)%, respectively. During the three and nine months ended September 29, 2019, the Company sustained higher book losses than the same periods in the prior year. The Company has a full valuation allowance on its U.S. federal and state deferred tax attributes. As a result, consistent with the prior year, the Company did not record a tax benefit on these losses because of uncertainty about its future profitability. The increase in income tax provision for the three months ended September 29, 2019, compared to the prior year period was primarily due to higher foreign earnings in the 2019 period compared to 2018. The increase in income tax provision for the nine months ended September 29, 2019, compared to the prior year period resulted primarily from the increase in U.S. state tax liability in the 2019 period compared to 2018.

Income Taxes

9 Months Ended

Sep. 29, 2019

The income tax provision for the three and nine months ended September 29, 2019, was $0.3 million, or an effective tax rate of (0.9)%, and $0.9 million, or an effective tax rate of (0.8)%, respectively. The income tax provision for the three and nine months ended September 30, 2018, was $0.2 million, or an effective tax rate of (1.7)%, and $0.8 million, or an effective tax rate of (2.3)%, respectively. During the three and nine months ended September 29, 2019, the Company sustained higher book losses than the same periods in the prior year. The Company has a full valuation allowance on its U.S. federal and state deferred tax attributes. As a result, consistent with the prior year, the Company did not record a tax benefit on these losses because of uncertainty about its future profitability. The increase in income tax provision for the three months ended September 29, 2019, compared to the prior year period was primarily due to higher foreign earnings in the 2019 period compared to 2018. The increase in income tax provision for the nine months ended September 29, 2019, compared to the prior year period resulted primarily from the increase in U.S. state tax liability in the 2019 period compared to 2018.