Related Party Transactions	12 Months Ended
Apr. 30, 2020
Related Party Transactions
Related Party Transactions	17. Related Party Transactions Pursuant to a consulting agreement, the Company paid a board member approximately $59,000, $55,000 and $48,000 for fiscal years ended April 30, 2020, 2019 and 2018, respectively, for consulting services independent of his board service. Concurrent with the formation of HAPSMobile, the Company executed a Design and Development Agreement (the “DDA”) with HAPSMobile. Under the DDA and related efforts, the Company will use its best efforts, up to a maximum value of $166,108,000, to design and build prototype solar powered high altitude aircraft and ground control stations for HAPSMobile and conduct low altitude and high altitude flight tests of the prototype aircraft. The Company recorded revenue under the DDA and preliminary design agreements between the Company and SoftBank of $60,864,000, $55,407,000 and $29,594,000 for the fiscal years ended April 30, 2020, 2019 and 2018, respectively. At April 30, 2020 and 2019, the Company had unbilled related party receivables from HAPSMobile of $15,779,000 and $9,028,000 recorded in unbilled receivables and retentions on the consolidated balance sheet, respectively. As of April 30, 2020, the Company owned approximately a 7% stake. Refer to Note 8 – Equity Method Investments for further details.

Related Party Transactions

12 Months Ended

Apr. 30, 2020

17. Related Party Transactions

Pursuant to a consulting agreement, the Company paid a board member approximately $59,000, $55,000 and $48,000 for fiscal years ended April 30, 2020, 2019 and 2018, respectively, for consulting services independent of his board service.

Concurrent with the formation of HAPSMobile, the Company executed a Design and Development Agreement (the “DDA”) with HAPSMobile. Under the DDA and related efforts, the Company will use its best efforts, up to a maximum value of $166,108,000, to design and build prototype solar powered high altitude aircraft and ground control stations for HAPSMobile and conduct low altitude and high altitude flight tests of the prototype aircraft.

The Company recorded revenue under the DDA and preliminary design agreements between the Company and SoftBank of $60,864,000, $55,407,000 and $29,594,000 for the fiscal years ended April 30, 2020, 2019 and 2018, respectively. At April 30, 2020 and 2019, the Company had unbilled related party receivables from HAPSMobile of

$15,779,000 and $9,028,000 recorded in unbilled receivables and retentions on the consolidated balance sheet, respectively. As of April 30, 2020, the Company owned approximately a 7% stake. Refer to Note 8 – Equity Method Investments for further details.