Quarterly report pursuant to Section 13 or 15(d)

Recently Adopted Accounting Guidance

Recently Adopted Accounting Guidance	9 Months Ended
Jan. 31, 2015
Accounting Changes and Error Corrections [Abstract]
Recently Adopted Accounting Guidance	(12) Recently Adopted Accounting Guidance In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers. The purpose of this new standard is to clarify the principles for recognizing revenue so that it can be applied consistently across various transactions, industries and capital markets. We have not completed our assessment of ASU No. 2014-09.

Recently Adopted Accounting Guidance

9 Months Ended

Jan. 31, 2015

Accounting Changes and Error Corrections [Abstract]

(12) Recently Adopted Accounting Guidance

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers. The purpose of this new standard is to clarify the principles for recognizing revenue so that it can be applied consistently across various transactions, industries and capital markets. We have not completed our assessment of ASU No. 2014-09.