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v3.22.2

Summary of Significant Accounting Policies - Narrative (Details) | 12 Months Ended |
--- | --- | ---
Apr. 30, 2022 USD ($) segment | Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Cash | $ 9,007,000 | $ 4,687,000 |
Cash equivalents | 0 | 0 |
Net income | 548,000 | 362,000 |
Accumulated deficit | 71,982,000 | 72,530,000 |
Working capital | 2,200,000 |  |
Impairment of long-lived assets | $ 0 | 0 |
Number of reportable segments | segment | 1 |  |
Unrecognized tax benefits | $ 181,000 | 181,000 | $ 178,000
Income tax penalties and interest expense | 0 | 3,000,000 |
Provision for (benefit) from income tax | $ 35,000 | $ 75,000 |
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 3 years |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 7 years |  |

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