Revenue Recognition - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 28, 2021	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020	Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Previously deferred revenue recognized		$ 4,000	$ 4,500	$ 16,900
Increase in contract assets		5,500
Decrease in deferred revenue		2,900
Unsatisfied performance obligation, amount		59,000
Previously satisfied performance obligation, amount		11,400
Total revenue		106,477	58,697	53,835
Number of shares called by warrant (in shares)	4,080,000
Exercise of warrants, price per share (in US dollars per share)	$ 10.74
Exercise period of warrant (in years)	7 years
Number of shares vested upon warrant exercise (in shares)	40,000
Maximum aggregate payments over contract term	$ 201,000
Grant date fair value of warrant (in US dollars per share)	$ 4.65
Warrant contra revenue		640	$ 0	$ 0
IP Licensing and Development Contract Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount					$ 43,500
Billed revenue from contract with customer		10,900
Total revenue		$ 11,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-05-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period		3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | IP Licensing and Development Contract Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period					3 years