Income Taxes	3 Months Ended
Mar. 31, 2013
Income Taxes [Abstract]
Income Taxes	10. Income Taxes The Company’s effective income tax rate was approximately 28% for the three months ended March 31, 2013 as compared to 37% for the three months ended March 31, 2012. The Company’s income tax rate in 2013 was favorably impacted by the full year 2012 research and development tax credit, which was enacted in January 2013 and, therefore, reduced the Company’s tax expense during the first quarter of 2013. The Company’s income tax rate in 2012 was negatively impacted by the absence of a research and development tax credit, which was not enacted for the 2012 tax year during 2012. Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax return purposes. The Company generates deferred tax assets primarily as a result of book write-downs, reserves, or impairments which are not immediately deductible for tax return purposes. The Company acquired significant deferred tax assets, primarily net operating loss carryforwards, from its acquisitions of Hemosphere and Cardiogenesis in the second quarters of 2012 and 2011, respectively. The Company currently estimates that a portion of its state net operating loss carryforwards will not be recoverable and has, therefore, recorded a valuation allowance against these state net operating loss carryforwards. As of March 31, 2013 the Company maintained a total of $2.3 million in valuation allowances against deferred tax assets, related to state net operating loss carryforwards, and a net deferred tax asset of $22.5 million. As of December 31, 2012 the Company had a total of $2.3 million in valuation allowances against deferred tax assets and a net deferred tax asset of $22.7 million.

Income Taxes

3 Months Ended

Mar. 31, 2013

10. Income Taxes

The Company’s effective income tax rate was approximately 28% for the three months ended March 31, 2013 as compared to 37% for the three months ended March 31, 2012. The Company’s income tax rate in 2013 was favorably impacted by the full year 2012 research and development tax credit, which was enacted in January 2013 and, therefore, reduced the Company’s tax expense during the first quarter of 2013. The Company’s income tax rate in 2012 was negatively impacted by the absence of a research and development tax credit, which was not enacted for the 2012 tax year during 2012.

Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax return purposes. The Company generates deferred tax assets primarily as a result of book write-downs, reserves, or impairments which are not immediately deductible for tax return purposes. The Company acquired significant deferred tax assets, primarily net operating loss carryforwards, from its acquisitions of Hemosphere and Cardiogenesis in the second quarters of 2012 and 2011, respectively. The Company currently estimates that a portion of its state net operating loss carryforwards will not be recoverable and has, therefore, recorded a valuation allowance against these state net operating loss carryforwards.

As of March 31, 2013 the Company maintained a total of $2.3 million in valuation allowances against deferred tax assets, related to state net operating loss carryforwards, and a net deferred tax asset of $22.5 million. As of December 31, 2012 the Company had a total of $2.3 million in valuation allowances against deferred tax assets and a net deferred tax asset of $22.7 million.