Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective income tax rate for the six months ended June 30, 2019 was 3%. The income tax expense for the six months ended June 30, 2019 was determined based upon estimates of the Company’s effective income tax rates in various jurisdictions. The difference between the Company’s effective income tax rate and the U.S. federal statutory rate is primarily attributable to state income taxes, foreign income taxes, the effect of certain permanent differences, the acquisition of Bellwether Bio, and full valuation allowance against net deferred tax assets. The benefit from income taxes for the three months ended June 30, 2019 relates primarily to the release of a valuation allowance of $1.2 million associated with nondeductible intangible assets recorded as part of the Bellwether Bio acquisition, partially offset by state minimum income tax and income tax on the Company’s earnings in foreign jurisdictions. In connection with the acquisition of Bellwether Bio, a deferred tax liability was established for the book-tax basis differences related to the non-goodwill intangible assets. The net deferred tax liability from this acquisition creates an additional source of income to offset the Company’s deferred tax assets. As such, the impact on the acquiring Company’s deferred tax assets and liabilities caused by an acquisition are recorded in the acquiring company’s consolidated financial statements outside of acquisition accounting. The income tax expense for the three months ended June 30, 2018 relates to state minimum income tax and income tax on the Company’s earnings in foreign jurisdictions.

Income Taxes

The Company’s effective income tax rate for the six months ended June 30, 2019 was 3%. The income tax expense for the six months ended June 30, 2019 was determined based upon estimates of the Company’s effective income tax rates in various jurisdictions. The difference between the Company’s effective income tax rate and the U.S. federal statutory rate is primarily attributable to state income taxes, foreign income taxes, the effect of certain permanent differences, the acquisition of Bellwether Bio, and full valuation allowance against net deferred tax assets.

The benefit from income taxes for the three months ended June 30, 2019 relates primarily to the release of a valuation allowance of $1.2 million associated with nondeductible intangible assets recorded as part of the Bellwether Bio acquisition, partially offset by state minimum income tax and income tax on the Company’s earnings in foreign jurisdictions. In connection with the acquisition of Bellwether Bio, a deferred tax liability was established for the book-tax basis differences related to the non-goodwill intangible assets. The net deferred tax liability from this acquisition creates an additional source of income to offset the Company’s deferred tax assets. As such, the impact on the acquiring Company’s deferred tax assets and liabilities caused by an acquisition are recorded in the acquiring company’s consolidated financial statements outside of acquisition accounting. The income tax expense for the three months ended June 30, 2018 relates to state minimum income tax and income tax on the Company’s earnings in foreign jurisdictions.