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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 (¥)	May 29, 2021 USD ($)	Mar. 31, 2022 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2022 JPY (¥)	May 29, 2021 JPY (¥)	Dec. 04, 2019	Dec. 27, 2017
Equity Method Investments
Equity method investment (loss) income, net of tax													$ (2,453,000)	$ 4,589,000	$ (10,481,000)
Equity method investment (loss) income													(2,453,000)	5,889,000	(10,481,000)
Percentage of ownership interest sold												7.00%
Carrying value of investment													$ 18,644,000	15,433,000
Altoy
Equity Method Investments
Percentage of ownership interest sold	35.00%					35.00%
Ownership interest	15.00%					85.00%
HAPSMobile
Equity Method Investments
Ownership percentage																		7.00%	5.00%
Equity method investment (loss) income, net of tax														$ 0	10,530,000
HAPSMobile | SoftBank
Equity Method Investments
Ownership percentage												7.00%	100.00%			7.00%
Payments for purchase of interest												$ 6,497,000				¥ 808,008,000
Execution of MDDA | ¥																	¥ 500,000,000
LOON LLC
Equity Method Investments
Amount of loss from impairment of investment															$ 8,363,000
Altoy
Equity Method Investments
Equity method investment (loss) income													$ (189,000)
Altoy | Other assets, long term
Equity Method Investments
Carrying value of investment													$ 114,000
MDDA
Equity Method Investments
Term of MDDA											5 years
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

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