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Basis of Presentation (Policies) | 9 Months Ended
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Jan. 31, 2014
Accounting Policies [Abstract] |
New Accounting Policies Adopted and Pending Adoption | New Accounting Pronouncements Pending Adoption Income Taxes In July 2013, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update for the reporting of an unrecognized tax benefit, or portion thereof, as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The update provides an exception, requiring the unrecognized tax benefit to be presented in the financial statements as a liability when the carryforward is not available at the reporting date under the tax laws to settle additional income taxes that would result for the disallowance of a tax provision or the tax laws do not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose. This guidance is effective prospectively, with retrospective application permitted, for annual periods, and interim reporting periods within those years, beginning after December 15, 2013, with early adoption permitted. We do not expect a material impact on our consolidated financial statements as a result of adopting this standard. Adoption of New Accounting Pronouncements Comprehensive Income In February 2013, the FASB issued an accounting standards update for the reporting of reclassifications out of accumulated other comprehensive income (loss). This guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income (loss) on the respective line items in net income (loss) or in the notes to consolidated financial statements if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income (loss). For other amounts not required under GAAP to be reclassified in their entirety to net income (loss) in the same reporting period, an entity is required to cross-reference other disclosures required under GAAP that provide additional detail about those amounts. This guidance is effective prospectively for annual and interim reporting periods within those years, beginning after December 15, 2012. We adopted this guidance effective May 1, 2013 and it has not had, and we believe it will not have, a material impact on our consolidated financial statements. See Note 7 for presentation of the information required by this accounting standards update. Indefinite-Lived Intangible Assets Impairment Test In July 2012, the FASB issued an accounting standards update on indefinite-lived intangible assets impairment testing. This guidance permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the quantitative impairment test. If after assessing the totality of events or circumstances, an entity determines that it is not more likely than not that the indefinite-lived intangible assets are impaired, then the entity will not need to perform the quantitative impairment test in accordance with FASB Accounting Standards Codification (“ASC”) 350-30. This guidance is effective for annual and interim indefinite-lived assets impairment tests performed for annual reporting periods beginning after September 15, 2012, with early adoption permitted. We adopted this guidance effective May 1, 2013 and it has not had, and we believe it will not have, a material impact on our consolidated financial statements.
Consolidation | Our joint venture partner in CARES is Altela, Inc. In accordance with ASC 810-10-15, we consolidate the assets, liabilities, noncontrolling interest and results of operations of CARES into our consolidated financial statements due to our controlling financial interest in the joint venture.

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- Definition Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02, 03 -Article 3A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2197480 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 40 -Section 45 -URI http://asc.fasb.org/section&trid=2197723 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196966 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2197087 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.3A-02) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355033-122828 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33801-111570 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=18733093&loc=d3e5614-111684 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph k -Article 1 + Details
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- Definition Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact. + References No definition available. + Details
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