Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We utilize our estimated annual effective tax rate to determine our provision for income taxes for interim periods. The income tax provision is computed by taking the estimated annual effective rate and multiplying it by the year-to-date pre-tax book income. We recorded income tax expense of $0.2 million and $2.1 million for the three months ended June 30, 2019 and 2018, respectively. We recorded income tax expense of $1.2 million and $1.9 million for the six months ended June 30, 2019 and 2018, respectively. Income tax expense for the six months ended June 30, 2019 decreased primarily due to the mix of pre-tax income among jurisdictions, including losses not benefited as a result of a valuation allowance and the net effect of remeasurement of deferred taxes to recognize the High Technology Exemption ("HTE") approved for our Yangzhou factory located in northern China. For the six months ended June 30, 2018, the tax expense of $1.9 million is attributable to the gain on sale of our Guangzhou factory located in southern China. At December 31, 2018, we assessed the realizability of the Company's deferred tax assets by considering whether it is "more likely than not" some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We considered taxable income in carryback years, the scheduled reversal of deferred tax liabilities, tax planning strategies and projected future taxable income in making this assessment. At December 31, 2018, we had a three year cumulative operating loss for our U.S. operations and accordingly, provided a full valuation allowance on our U.S. and state deferred tax assets. During three months ended June 30, 2019, there has been no change to the Company's valuation allowance position. At June 30, 2019, we had gross unrecognized tax benefits of $4.7 million, including interest and penalties, of which approximately $4.4 million of this amount, if not for the state Research and Experimentation income tax credit valuation allowance, would affect the annual effective tax rate, if these tax benefits are realized. Further, we are unaware of any positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly increase within the next twelve months. However, based on federal, state and foreign statute expirations in various jurisdictions, we anticipate a decrease in unrecognized tax benefits of approximately $0.2 million within the next twelve months. We have classified uncertain tax positions as non-current income tax liabilities unless expected to be paid within one year. We have elected to classify interest and penalties as a component of tax expense. Accrued interest and penalties of $0.5 million as of June 30, 2019 and $0.5 million at December 31, 2018 are included in the unrecognized tax benefits.

Income Taxes

We utilize our estimated annual effective tax rate to determine our provision for income taxes for interim periods. The income tax provision is computed by taking the estimated annual effective rate and multiplying it by the year-to-date pre-tax book income.

We recorded income tax expense of $0.2 million and $2.1 million for the three months ended June 30, 2019 and 2018, respectively. We recorded income tax expense of $1.2 million and $1.9 million for the six months ended June 30, 2019 and 2018, respectively. Income tax expense for the six months ended June 30, 2019 decreased primarily due to the mix of pre-tax income among jurisdictions, including losses not benefited as a result of a valuation allowance and the net effect of remeasurement of deferred taxes to recognize the High Technology Exemption ("HTE") approved for our Yangzhou factory located in northern China. For the six months ended June 30, 2018, the tax expense of $1.9 million is attributable to the gain on sale of our Guangzhou factory located in southern China.

At December 31, 2018, we assessed the realizability of the Company's deferred tax assets by considering whether it is "more likely than not" some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We considered taxable income in carryback years, the scheduled reversal of deferred tax liabilities, tax planning strategies and projected future taxable income in making this assessment. At December 31, 2018, we had a three year cumulative operating loss for our U.S. operations and accordingly, provided a full valuation allowance on our U.S. and state deferred tax assets. During three months ended June 30, 2019, there has been no change to the Company's valuation allowance position.

At June 30, 2019, we had gross unrecognized tax benefits of $4.7 million, including interest and penalties, of which approximately $4.4 million of this amount, if not for the state Research and Experimentation income tax credit valuation allowance, would affect the annual effective tax rate, if these tax benefits are realized. Further, we are unaware of any positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly increase within the next twelve months. However, based on federal, state and foreign statute expirations in various jurisdictions, we anticipate a decrease in unrecognized tax benefits of approximately $0.2 million within the next twelve months. We have classified uncertain tax positions as non-current income tax liabilities unless expected to be paid within one year.

We have elected to classify interest and penalties as a component of tax expense. Accrued interest and penalties of $0.5 million as of June 30, 2019 and $0.5 million at December 31, 2018 are included in the unrecognized tax benefits.