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Investments in Companies Accounted for Using the Equity Method (Details)
1 Months Ended 12 Months Ended
Oct. 14, 2022
Mar. 01, 2022
USD ($)
Mar. 01, 2022
JPY (¥)
Oct. 29, 2021
USD ($)
Oct. 29, 2021
JPY (¥)
Sep. 15, 2021
Aug. 13, 2021
USD ($)
Aug. 13, 2021
JPY (¥)
Jun. 07, 2021
USD ($)
Jun. 07, 2021
JPY (¥)
Mar. 31, 2022
USD ($)
Apr. 30, 2024
USD ($)
Apr. 30, 2023
USD ($)
Apr. 30, 2022
USD ($)
Mar. 31, 2022
JPY (¥)
May 29, 2021
USD ($)
May 29, 2021
JPY (¥)
Dec. 04, 2019
Dec. 27, 2017
Equity Method Investments                                      
Equity method investment (loss) income                       $ (1,674,000) $ (2,453,000) $ 5,889,000          
Percentage of ownership interest sold                     7.00%                
Carrying value of investment                       $ 19,933,000 18,644,000            
Altoy                                      
Equity Method Investments                                      
Percentage of ownership interest sold 35.00%         35.00%                          
Ownership interest 15.00%         85.00%                          
HAPSMobile                                      
Equity Method Investments                                      
Ownership interest                       100.00%              
HAPSMobile                                      
Equity Method Investments                                      
Ownership percentage                     7.00%       7.00%     7.00% 5.00%
Payments for purchase of interest                     $ 6,497,000       ¥ 808,008,000        
HAPSMobile | SoftBank                                      
Equity Method Investments                                      
Ownership percentage                     100.00%       100.00%        
Execution of MDDA | ¥                                 ¥ 500,000,000    
LOON LLC                                      
Equity Method Investments                                      
Carrying value of investment                       $ 152,000              
Altoy                                      
Equity Method Investments                                      
Payments for purchase of interest                       108,000              
Equity method investment (loss) income                       $ 0 189,000            
Carrying value of investment                         $ 114,000            
MDDA | SoftBank                                      
Equity Method Investments                                      
Maximum value under MDDA                               $ 51,200,000      
MDDA | HAPSMobile                                      
Equity Method Investments                                      
Amount funded   $ 4,345,000 ¥ 503,832,000 $ 1,674,000 ¥ 190,000,000   $ 1,638,000 ¥ 180,000,000 $ 1,195,000 ¥ 130,000,000