Fair Value Measurement	6 Months Ended
Oct. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	(6) Fair Value Measurement: We follow the provisions of Accounting Standards Codification, or ASC, 820-10, Fair Value Measurements and Disclosures Topic, or ASC 820-10, for our financial assets and liabilities. ASC 820-10 provides a framework for measuring fair value under GAAP and requires expanded disclosures regarding fair value measurements. ASC 820-10 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820-10 also establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value. Financial assets and liabilities recorded on the accompanying condensed consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows: Level 1 — Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market that we have the ability to access at the measurement date (examples include active exchange-traded equity securities, listed derivatives, and most U.S. Government and agency securities). Our cash and cash equivalents, which are measured at fair value on a recurring basis, totaled $159.4 million and $113.0 million as of October 31, 2021 and April 30, 2021, respectively. We utilized Level 1 of the value hierarchy to determine the fair values of these assets. Level 2 — Financial assets and liabilities whose values are based on quoted prices in markets in which trading occurs infrequently or whose values are based on quoted prices of instruments with similar attributes in active markets. Level 2 inputs include the following:  quoted prices for identical or similar assets or liabilities in non-active markets (such as corporate and municipal bonds which trade infrequently);  inputs other than quoted prices that are observable for substantially the full term of the asset or liability (such as interest rate and currency swaps); and  inputs that are derived principally from or corroborated by observable market data for substantially the full term of the asset or liability (such as certain securities and derivatives). Level 3 — Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect our judgments about the assumptions a market participant would use in pricing the asset or liability. We do not have any Level 2 or Level 3 financial assets or liabilities as of October 31, 2021.

Fair Value Measurement

6 Months Ended

Oct. 31, 2021

(6) Fair Value Measurement:

We follow the provisions of Accounting Standards Codification, or ASC, 820-10, Fair Value Measurements and Disclosures Topic, or ASC 820-10, for our financial assets and liabilities. ASC 820-10 provides a framework for measuring fair value under GAAP

and requires expanded disclosures regarding fair value measurements. ASC 820-10 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820-10 also establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value.

Financial assets and liabilities recorded on the accompanying condensed consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows:

Level 1 — Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market that we have the ability to access at the measurement date (examples include active exchange-traded equity securities, listed derivatives, and most U.S. Government and agency securities).

Our cash and cash equivalents, which are measured at fair value on a recurring basis, totaled $159.4 million and $113.0 million as of October 31, 2021 and April 30, 2021, respectively. We utilized Level 1 of the value hierarchy to determine the fair values of these assets.

Level 2 — Financial assets and liabilities whose values are based on quoted prices in markets in which trading occurs infrequently or whose values are based on quoted prices of instruments with similar attributes in active markets. Level 2 inputs include the following:



quoted prices for identical or similar assets or liabilities in non-active markets (such as corporate and municipal bonds which trade infrequently);



inputs other than quoted prices that are observable for substantially the full term of the asset or liability (such as interest rate and currency swaps); and



inputs that are derived principally from or corroborated by observable market data for substantially the full term of the asset or liability (such as certain securities and derivatives).

Level 3 — Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect our judgments about the assumptions a market participant would use in pricing the asset or liability.

We do not have any Level 2 or Level 3 financial assets or liabilities as of October 31, 2021.