Related Party Transactions	12 Months Ended
Apr. 30, 2023
Related Party Transactions
Related Party Transactions	19. Related Party Transactions Pursuant to a consulting agreement, the Company paid a board member approximately $76,000, $36,000 and $29,000 for fiscal years ended April 30, 2023, 2022 and 2021, respectively, for consulting services independent of his board service. Related party transactions are defined as transactions between the Company and entities either controlled by the Company or that the Company can significantly influence. Prior to the Company’s sale of all of its equity interest in HAPSMobile in March 2022, the Company determined that it had the ability to exercise significant influence over HAPSMobile. As such, HAPSMobile and SoftBank were considered related parties of the Company prior to the sale. Subsequent to the sale, the Company had no ownership stake in HAPSMobile, and SoftBank and HAPSMobile are no longer considered related parties. Under the DDA and related efforts with HAPSMobile, the Company designed and built prototype solar powered high altitude aircraft and ground control stations for HAPSMobile and conducted low altitude and high altitude flight tests of the prototype aircraft on a best efforts basis. The Company will continue the development of Solar HAPS with SoftBank under the MDDA. Upon the execution of the MDDA, SoftBank issued the first order under the MDDA, which has a maximum value of approximately $51,200,000. The Company recorded revenue under both the MDDA and DDA and preliminary design agreements between the Company and SoftBank of $43,325,000 and $42,426,000 for the fiscal years ended April 30, 2022 and 2021, respectively. At April 30, 2022, the Company had unbilled related party receivables from HAPSMobile of $2,229,000 recorded in unbilled receivables and retentions on the consolidated balance sheets. As of April 30, 2023, the Company had no ownership stake in HAPSMobile and SoftBank and HAPSMobile are no longer considered related parties. Refer to Note 8— Investments in Companies Accounted for Using the Equity Method for further details.

Related Party Transactions

12 Months Ended

Apr. 30, 2023

19. Related Party Transactions

Pursuant to a consulting agreement, the Company paid a board member approximately $76,000, $36,000 and $29,000 for fiscal years ended April 30, 2023, 2022 and 2021, respectively, for consulting services independent of his board service.

Related party transactions are defined as transactions between the Company and entities either controlled by the Company or that the Company can significantly influence. Prior to the Company’s sale of all of its equity interest in HAPSMobile in March 2022, the Company determined that it had the ability to exercise significant influence over HAPSMobile. As such, HAPSMobile and SoftBank were considered related parties of the Company prior to the sale. Subsequent to the sale, the Company had no ownership stake in HAPSMobile, and SoftBank and HAPSMobile are no longer considered related parties. Under the DDA and related efforts with HAPSMobile, the Company designed and built prototype solar powered high altitude aircraft and ground control stations for HAPSMobile and conducted low altitude and high altitude flight tests of the prototype aircraft on a best efforts basis. The Company will continue the development of Solar HAPS with SoftBank under the MDDA. Upon the execution of the MDDA, SoftBank issued the first order under the MDDA, which has a maximum value of approximately $51,200,000.

The Company recorded revenue under both the MDDA and DDA and preliminary design agreements between the Company and SoftBank of $43,325,000 and $42,426,000 for the fiscal years ended April 30, 2022 and 2021, respectively. At April 30, 2022, the Company had unbilled related party receivables from HAPSMobile of $2,229,000 recorded in unbilled receivables and retentions on the consolidated balance sheets. As of April 30, 2023, the Company had no ownership stake in HAPSMobile and SoftBank and HAPSMobile are no longer considered related parties. Refer to Note 8— Investments in Companies Accounted for Using the Equity Method for further details.