Subsequent Events	6 Months Ended
Oct. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn November 5, 2021, the Company experienced a criminal network cyber attack that led to a disruption of its domestic operations, including manufacturing, engineering, administration, and sales operations. As of November 15, 2021 the Company had substantially restored its operations. The Company engaged third party experts, including a cybersecurity firm, to perform a fulsome forensic investigation of the attack; among other things, the cybersecurity firm assessed whether any confidential or sensitive data had been compromised. Based on the results of the investigation to date, the Company does not believe any confidential or sensitive data has been downloaded, stolen from the Company's systems, or otherwise exfiltrated. The Company will continue to evaluate the incident and determine the appropriate actions to take, if any, in light of what is discovered. The investigation is on-going. The Company has insurance coverage against recovery costs and business interruption resulting from cyber-attacks. However, the Company may have incurred, and may incur in the future, expenses and losses related to this attack that are not covered by insurance. The total amount of such expenses or losses cannot be estimated at this time; however, it is likely that the costs related to this event will exhaust the Company's existing insurance coverage related to cyber attacks. While the Company will seek to obtain insurance for losses related to any similar future events, there can be no assurance that such insurance will be available to the Company.

Subsequent Events

6 Months Ended

Oct. 31, 2021

Subsequent EventsOn November 5, 2021, the Company experienced a criminal network cyber attack that led to a disruption of its domestic operations, including manufacturing, engineering, administration, and sales operations. As of November 15, 2021 the Company had substantially restored its operations. The Company engaged third party experts, including a cybersecurity firm, to perform a fulsome forensic investigation of the attack; among other things, the cybersecurity firm assessed whether any confidential or sensitive data had been compromised. Based on the results of the investigation to date, the Company does not believe any confidential or sensitive data has been downloaded, stolen from the Company's systems, or otherwise exfiltrated. The Company will continue to evaluate the incident and determine the appropriate actions to take, if any, in light of what is discovered. The investigation is on-going. The Company has insurance coverage against recovery costs and business interruption resulting from cyber-attacks. However, the Company may have incurred, and may incur in the future, expenses and losses related to this attack that are not covered by insurance. The total amount of such expenses or losses cannot be estimated at this time; however, it is likely that the costs related to this event will exhaust the Company's existing insurance coverage related to cyber attacks. While the Company will seek to obtain insurance for losses related to any similar future events, there can be no assurance that such insurance will be available to the Company.