Income Taxes	9 Months Ended
Jan. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes We are subject to U.S. Federal income tax as well as the income taxes of multiple state jurisdictions. As a result of the completion of examinations by the Internal Revenue Service on prior years and the expiration of statutes of limitations, our fiscal years 2012, 2013, and 2014 are the remaining years open under statutes of limitations. Certain subsidiaries are also subject to income tax in several foreign jurisdictions which have open tax years varying by jurisdiction beginning in fiscal 2005. As of January 31, 2015, we had $0.5 million of unrecognized tax benefits which would affect our effective tax rate if recognized. On December 19, 2014, the President signed into law The Tax Increase Prevention Act of 2014. Under prior law, a taxpayer was entitled to a research tax credit for qualifying amounts paid or incurred on or before December 31, 2013. The 2014 Tax Increase Prevention Act extends the research credit for one year to December 31, 2014. The extension of the research credit is retroactive and includes amounts paid or incurred after December 31, 2013. As a result of the retroactive extension, we recognized in the third quarter of fiscal 2015 approximately $1.3 million in tax benefits for the credit.

Income Taxes

9 Months Ended

Jan. 31, 2015

Note 11. Income Taxes

We are subject to U.S. Federal income tax as well as the income taxes of multiple state jurisdictions. As a result of the completion of examinations by the Internal Revenue Service on prior years and the expiration of statutes of limitations, our fiscal years 2012, 2013, and 2014 are the remaining years open under statutes of limitations. Certain subsidiaries are also subject to income tax in several foreign jurisdictions which have open tax years varying by jurisdiction beginning in fiscal 2005.

As of January 31, 2015, we had $0.5 million of unrecognized tax benefits which would affect our effective tax rate if recognized.

On December 19, 2014, the President signed into law The Tax Increase Prevention Act of 2014. Under prior law, a taxpayer was entitled to a research tax credit for qualifying amounts paid or incurred on or before December 31, 2013. The 2014 Tax Increase Prevention Act extends the research credit for one year to December 31, 2014. The extension of the research credit is retroactive and includes amounts paid or incurred after December 31, 2013. As a result of the retroactive extension, we recognized in the third quarter of fiscal 2015 approximately $1.3 million in tax benefits for the credit.