XML 37 R26.htm IDEA: XBRL DOCUMENT
v3.25.2

Note 1 - Organization and Summary of Significant Accounting Policies (Tables) | 3 Months Ended
--- | ---
Jul. 31, 2025
Notes Tables |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  | As of July 31, 2025 |  |  |  |  |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents |  | $ | 33,430 |  |  | $ | - |  |  | $ | - |  |  | $ | 33,430 |
Equity securities |  |  | 22,126 |  |  |  | - |  |  |  | - |  |  |  | 22,126 |
Available-for-sale fixed income securities |  |  | 25,362 |  |  |  | - |  |  |  | - |  |  |  | 25,362 |
|  | $ | 80,918 |  |  | $ | - |  |  | $ | - |  |  | $ | 80,918 |
|  | As of April 30, 2025 |  |  |  |  |
($ in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents |  | $ | 33,615 |  |  | $ | - |  |  | $ | - |  |  | $ | 33,615 |
Equity securities |  |  | 20,879 |  |  |  | - |  |  |  | - |  |  |  | 20,879 |
Available-for-sale fixed income securities |  |  | 22,435 |  |  |  | - |  |  |  | - |  |  |  | 22,435 |
|  | $ | 76,929 |  |  | $ | - |  |  | $ | - |  |  | $ | 76,929 |

X
- Definition Tabular disclosure of financial instrument measured at fair value on recurring or nonrecurring basis. Includes, but is not limited to, instrument classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration