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Investments in Companies Accounted for Using the Equity Method - Investment in Limited Partnership Fund (Details) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 04, 2021 | Jul. 15, 2020 | May 31, 2022 | Mar. 31, 2022 | Jul. 31, 2019 | Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2020
Equity Method Investments |  |  |  |  |  |  |  |
Equity method investment income (loss), net of tax |  |  |  |  |  | $ 4,589,000 | $ (10,481,000) | $ (5,487,000)
Carrying value of investment |  |  |  |  |  | 15,433,000 | 7,168,000 |
Limited Partnership Fund |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |
Capital contributions | $ 2,675,000 | $ 2,377,000 | $ 2,774,000 | $ 20,000,000 | $ 4,948,000 |  |  |
Expected years contributions will be made |  |  |  | 5 years |  |  |  |
Additional capital contributions |  |  |  |  |  | 0 |  |
Equity method investment income (loss), net of tax |  |  |  |  |  | 5,889,000 | 49,000 | (394,000)
Income tax expense from equity method investments |  |  |  |  |  | 1,300,000 | 11 | 111,000
Limited Partnership Fund | Long term investments |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |
Carrying value of investment |  |  |  |  |  | 15,433,000 | 7,168,000 |
HAPSMobile | Equity method investment loss, net of tax |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |
Equity method investment income (loss), net of tax |  |  |  |  |  | $ 0 | $ 10,530,000 | $ 4,982,000

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
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