Stock-Based Compensation - Schedule of Valuation Assumptions Under ESPP (Details)	12 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Valuation assumptions:
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility, minimum	68.50%	65.50%	62.30%
Expected volatility, maximum	71.00%	66.20%	62.30%
Risk-free interest rate, minimum	3.70%	3.50%	4.70%
Risk-free interest rate, maximum	3.95%	4.60%	4.70%
Minimum
Valuation assumptions:
Expected term (years)	5 years 9 months 18 days	6 years	6 years 6 months
Maximum
Valuation assumptions:
Expected term (years)	6 years 6 months	6 years 6 months	6 years 6 months
ESPP \| 2020 Employee Stock Purchase Plan
Valuation assumptions:
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility, minimum	63.90%	56.20%	54.50%
Expected volatility, maximum	67.60%	79.80%	73.30%
Risk-free interest rate, minimum	3.51%	3.60%	4.70%
Risk-free interest rate, maximum	3.80%	4.60%	5.50%
ESPP \| 2020 Employee Stock Purchase Plan \| Minimum
Valuation assumptions:
Expected term (years)	6 months	6 months	6 months
ESPP \| 2020 Employee Stock Purchase Plan \| Maximum
Valuation assumptions:
Expected term (years)	2 years	2 years	2 years

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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