Basis of Presentation (Policies)	3 Months Ended
Jul. 31, 2021
Accounting Policies [Abstract]
Interim Financial Information	Interim Financial Information – The condensed consolidated balance sheet as of July 31, 2021, the condensed consolidated statements of income for the three months ended July 31, 2021 and 2020, the condensed consolidated statements of changes in stockholders’ equity for the three months ended July 31, 2021 and 2020, and the condensed consolidated statements of cash flows for the three months ended July 31, 2021 and 2020 have been prepared by us without audit. In our opinion, all adjustments, which include only normal recurring adjustments necessary to fairly present the financial position, results of operations, changes in stockholders’ equity, and cash flows for the three months ended July 31, 2021 and for the periods presented, have been included. All intercompany transactions have been eliminated in consolidation. The consolidated balance sheet as of April 30, 2021 has been derived from our audited consolidated financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States, or GAAP, have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended April 30, 2021. The results of operations for the three months ended July 31, 2021 may not be indicative of the results that may be expected for the fiscal year ending April 30, 2022, or any other period.
Recently Issued Accounting Standards	In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes," an update that amends and simplifies the accounting for income taxes by removing certain exceptions in the existing guidance and providing new guidance to reduce complexity in certain areas. The guidance went into effect at the start of this fiscal year ending April 30, 2022 with early adoption permitted. We have reviewed the amendments in this update and determined that there were no material changes or impacts on our condensed consolidated financial statements.

Basis of Presentation (Policies)

3 Months Ended

Jul. 31, 2021

Interim Financial Information – The condensed consolidated balance sheet as of July 31, 2021, the condensed consolidated statements of income for the three months ended July 31, 2021 and 2020, the condensed consolidated statements of changes in stockholders’ equity for the three months ended July 31, 2021 and 2020, and the condensed consolidated statements of cash flows for the three months ended July 31, 2021 and 2020 have been prepared by us without audit. In our opinion, all adjustments, which include only normal recurring adjustments necessary to fairly present the financial position, results of operations, changes in stockholders’ equity, and cash flows for the three months ended July 31, 2021 and for the periods presented, have been included. All intercompany transactions have been eliminated in consolidation. The consolidated balance sheet as of April 30, 2021 has been derived from our audited consolidated financial statements.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States, or GAAP, have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended April 30, 2021. The results of operations for the three months ended July 31, 2021 may not be indicative of the results that may be expected for the fiscal year ending April 30, 2022, or any other period.

Recently Issued Accounting Standards

In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes," an update that amends and simplifies the accounting for income taxes by removing certain exceptions in the existing guidance and providing new guidance to reduce complexity in certain areas. The guidance went into effect at the start of this fiscal year ending April 30, 2022 with early adoption permitted. We have reviewed the amendments in this update and determined that there were no material changes or impacts on our condensed consolidated financial statements.