Basis of Presentation (Policies)	3 Months Ended
Jul. 31, 2017
Basis of Presentation [Abstract]
Basis of Presentation	In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the financial condition, results of operations, comprehensive income (loss) and cash flows for the periods presented. Operating results for the interim period are not necessarily indicative of the results expected for the full year. These financial statements should be read in conjunction with the most recent audited financial statements included in the Company's Form 10-K for the fiscal year ended April 30, 2017. The preparation of the Company's financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Certain prior year amounts have been reclassified to conform to the current year's presentation. Effective April 30, 2017, the Company adopted Accounting Standard Update ("ASU") 2015-17 "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes." ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The Company elected to adopt this standard prospectively and thus prior period balances were not adjusted. As of July 31, 2016, there were $11.8 million of current deferred tax assets reported within Prepaid and Other Current Assets in the Condensed Consolidated Statements of Financial Position. Effective August 1, 2016, the Company completed a number of changes to its organizational structure that resulted in a change in how the Company manages its business, allocates resources and measures performance. As a result, the Company has revised its reportable segments to reflect how management currently reviews financial information and makes operating decisions. Refer to Note 8, "Segment Information" for additional information on the changes in reportable segments. All prior period amounts have been adjusted to reflect the reportable segment change.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the financial condition, results of operations, comprehensive income (loss) and cash flows for the periods presented. Operating results for the interim period are not necessarily indicative of the results expected for the full year. These financial statements should be read in conjunction with the most recent audited financial statements included in the Company's Form 10-K for the fiscal year ended April 30, 2017.

The preparation of the Company's financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Certain prior year amounts have been reclassified to conform to the current year's presentation.

Effective April 30, 2017, the Company adopted Accounting Standard Update ("ASU") 2015-17 "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes." ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The Company elected to adopt this standard prospectively and thus prior period balances were not adjusted. As of July 31, 2016, there were $11.8 million of current deferred tax assets reported within Prepaid and Other Current Assets in the Condensed Consolidated Statements of Financial Position.

Effective August 1, 2016, the Company completed a number of changes to its organizational structure that resulted in a change in how the Company manages its business, allocates resources and measures performance. As a result, the Company has revised its reportable segments to reflect how management currently reviews financial information and makes operating decisions. Refer to Note 8, "Segment Information" for additional information on the changes in reportable segments. All prior period amounts have been adjusted to reflect the reportable segment change.