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v3.23.2

Summary of Significant Accounting Policies (Details Narrative) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Apr. 30, 2023 | Aug. 31, 2020
Product Information [Line Items] |  |  |  |
Cash and cash equivalents | $ 3,863,000 |  | $ 6,883,000 |
Short term investments | 22,790,000 |  | $ 27,790,000 |
Accretion of discount and amortization of premium on investments | 100,000 | $ 200,000 |  |
Share-based compensation expense | 401,000 | $ 333,000 |  |
Revenue remaining performance obligation | $ 3,100,000 |  |  |
Expects to recognize revenue remaining performance obligation, percentage | 96.00% |  |  |
Expects to recognize revenue remaining performance obligation | $ 3,000,000.0 |  |  |
Antidilutive securities excluded from computation of earnings per share, amount | 7,614,992 | 6,378,212 |  |
Product development expense | $ 1,900,000 | $ 2,300,000 |  |
Patents [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Intangible asset estimated lives | 20 years |  |  |
Trade Names [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Intangible asset estimated lives | 12 years |  |  |
Customer Relationships [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Intangible asset estimated lives | 10 years |  |  |
Transferred over Time [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue remaining performance obligation | $ 500,000 |  |  |
Transferred at Point in Time [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue remaining performance obligation | $ 800,000 |  |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Four and Three Customers [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Concentration risk percentage | 73.00% | 69.00% |  |
Santander Bank [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Deposits | $ 156,000 |  |  |
Santander Bank [Member] | January 2024 [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Letters of credit issued amount |  |  |  | $ 65,000

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