Income Taxes	9 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes For interim income tax reporting, the Company estimates its annual effective tax rate and applies it to year-to-date pretax income, excluding unusual or infrequently occurring discrete items. Tax jurisdictions with losses for which tax benefits cannot be realized are excluded. The Company recorded income tax provisions of $0.5 million and $2.9 million for the three months ended June 30, 2017 and 2016, respectively, representing effective tax rates, defined as income tax expense divided by income before taxes, of 42.5% and 42.8%, respectively. The Company recorded income tax provisions of $3.3 million and $5.4 million for the nine months ended June 30, 2017 and 2016, respectively, representing effective tax rates of 48.5% and 42.3%, respectively. The Company’s effective tax reflects the impact of state income taxes, permanent tax items and discrete tax benefits. The effective income tax rate for the three and nine-month periods ended June 30, 2017 and 2016 differs from the U.S. federal statutory tax rate of 35.0% primarily due to operating losses in Ireland, where tax benefits are offset by a valuation allowance, as well as amortization, transaction costs (fiscal 2016 only) and contingent consideration accretion, including fair value adjustments, associated with the Creagh Medical and NorMedix acquisitions and foreign currency translation gains and losses on Euro-denominated contingent consideration liabilities, all of which are not deductible for income tax purposes. These increases to the effective income tax rate are partially offset by the domestic production manufacturing deduction and the U.S. federal research and development income tax credit. The effective income tax rate for the nine months ended June 30, 2017 is also impacted by discrete tax expense of $0.3 million related to expiring stock option awards, partially offset by $0.2 of state income tax reserve reversals related to the expiration of statutory filing requirements in each period. The total amount of unrecognized tax benefits, excluding interest and penalties that, if recognized, would affect the effective tax rate is $1.2 million as of June 30, 2017 and September 30, 2016. Currently, the Company does not expect the liability for unrecognized tax benefits to change significantly in the next 12 months with the above balances classified on the condensed consolidated balance sheets in other long-term liabilities. Interest and penalties related to unrecognized tax benefits are recorded in income tax provision. The Company files income tax returns, including returns for its subsidiaries, in the U.S. federal jurisdiction and in various state jurisdictions as well as several non-U.S. jurisdictions. Uncertain tax positions are related to tax years that remain subject to examination. U.S. income tax returns for years prior to fiscal 2014 are no longer subject to examination by federal tax authorities. For tax returns for state and local jurisdictions, the Company is no longer subject to examination for tax years generally before fiscal 2007. For tax returns for non-U.S. jurisdictions, the Company is no longer subject to income tax examination for years prior to 2012. Additionally, the Company has been indemnified of liability for any taxes relating to Creagh Medical and NorMedix for periods prior to the respective acquisition dates, pursuant to the terms of the related share purchase agreements. As of June 30, 2017 and September 30, 2016, there were no undistributed earnings in foreign subsidiaries.

13. Income Taxes

For interim income tax reporting, the Company estimates its annual effective tax rate and applies it to year-to-date pretax income, excluding unusual or infrequently occurring discrete items. Tax jurisdictions with losses for which tax benefits cannot be realized are excluded. The Company recorded income tax provisions of $0.5 million and $2.9 million for the three months ended June 30, 2017 and 2016, respectively, representing effective tax rates, defined as income tax expense divided by income before taxes, of 42.5% and 42.8%, respectively. The Company recorded income tax provisions of $3.3 million and $5.4 million for the nine months ended June 30, 2017 and 2016, respectively, representing effective tax rates of 48.5% and 42.3%, respectively. The Company’s effective tax reflects the impact of state income taxes, permanent tax items and discrete tax benefits. The effective income tax rate for the three and nine-month periods ended June 30, 2017 and 2016 differs from the U.S. federal statutory tax rate of 35.0% primarily due to operating losses in Ireland, where tax benefits are offset by a valuation allowance, as well as amortization, transaction costs (fiscal 2016 only) and contingent consideration accretion, including fair value adjustments, associated with the Creagh Medical and NorMedix acquisitions and foreign currency translation gains and losses on Euro-denominated contingent consideration liabilities, all of which are not deductible for income tax purposes. These increases to the effective income tax rate are partially offset by the domestic production manufacturing deduction and the U.S. federal research and development income tax credit. The effective income tax rate for the nine months ended June 30, 2017 is also impacted by discrete tax expense of $0.3 million related to expiring stock option awards, partially offset by $0.2 of state income tax reserve reversals related to the expiration of statutory filing requirements in each period.

The total amount of unrecognized tax benefits, excluding interest and penalties that, if recognized, would affect the effective tax rate is $1.2 million as of June 30, 2017 and September 30, 2016. Currently, the Company does not expect the liability for unrecognized tax benefits to change significantly in the next 12 months with the above balances classified on the condensed consolidated balance sheets in other long-term liabilities. Interest and penalties related to unrecognized tax benefits are recorded in income tax provision.

The Company files income tax returns, including returns for its subsidiaries, in the U.S. federal jurisdiction and in various state jurisdictions as well as several non-U.S. jurisdictions. Uncertain tax positions are related to tax years that remain subject to examination. U.S. income tax returns for years prior to fiscal 2014 are no longer subject to examination by federal tax authorities. For tax returns for state and local jurisdictions, the Company is no longer subject to examination for tax years generally before fiscal 2007. For tax returns for non-U.S. jurisdictions, the Company is no longer subject to income tax examination for years prior to 2012. Additionally, the Company has been indemnified of liability for any taxes relating to Creagh Medical and NorMedix for periods prior to the respective acquisition dates, pursuant to the terms of the related share purchase agreements. As of June 30, 2017 and September 30, 2016, there were no undistributed earnings in foreign subsidiaries.