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Note 2 - Investments (Tables) | 6 Months Ended
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Oct. 31, 2023
Notes Tables |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
($ in thousands) |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
ETFs - equities |  | $ | 10,146 |  |  | $ | 2,923 |  |  | $ | (5 | ) |  | $ | 13,064 |
($ in thousands) |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
ETFs - equities |  | $ | 10,169 |  |  | $ | 4,392 |  |  | $ | (15 | ) |  | $ | 14,546 |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  | Amortized |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Historical Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within 1 year |  | $ | 38,133 |  |  | $ | - |  |  | $ | (43 | ) |  | $ | 38,090 |
Due 1 year through 5 years |  |  | 5,136 |  |  |  | - |  |  |  | (320 | ) |  |  | 4,816 |
Total investment in government debt securities |  | $ | 43,269 |  |  | $ | - |  |  | $ | (363 | ) |  | $ | 42,906 |
|  | Amortized |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Historical Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within 1 year |  | $ | 34,384 |  |  | $ | 486 |  |  | $ | (5 | ) |  | $ | 34,865 |
Due within 1 year through 5 years |  |  | 5,071 |  |  |  |  |  |  |  | (8 | ) |  |  | 5,063 |
Total investment in government debt securities |  | $ | 39,455 |  |  | $ | 486 |  |  | $ | (13 | ) |  | $ | 39,928 |
Investment Income [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
($ in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Dividend income |  | $ | 133 |  |  | $ | 141 |  |  | $ | 278 |  |  | $ | 254 |
Interest income |  |  | 487 |  |  |  | 158 |  |  |  | 876 |  |  |  | 201 |
Investment gains/(losses) recognized on sales of equity securities during the period |  |  | (14 | ) |  |  | 3 |  |  |  | (3 | ) |  |  | 5 |
Unrealized gains/(losses) recognized on equity securities held at the end of the period |  |  | (1,685 | ) |  |  | (577 | ) |  |  | (1,475 | ) |  |  | (434 | )
Other |  |  | - |  |  |  | 7 |  |  |  | - |  |  |  | - |
Total investment gains/(losses) |  | $ | (1,079 | ) |  | $ | (268 | ) |  | $ | (324 | ) |  | $ | 26 |
Investment Holdings, Other than Securities [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
($ in thousands) (unaudited) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Investment management fees earned from the Value Line Funds, net of waivers shown below |  | $ | 5,640 |  |  | $ | 4,952 |  |  | $ | 11,068 |  |  | $ | 10,142 |
12b-1 fees and other fees, net of waivers shown below |  | $ | 1,600 |  |  | $ | 1,491 |  |  | $ | 3,179 |  |  | $ | 3,050 |
Other income |  | $ | (14 | ) |  | $ | (4 | ) |  | $ | 103 |  |  | $ | 4 |
Investment management fee waivers and reimbursements |  | $ | 114 |  |  | $ | 49 |  |  | $ | 162 |  |  | $ | 31 |
12b-1 fee waivers |  | $ | 23 |  |  | $ | 27 |  |  | $ | 48 |  |  | $ | 54 |
Value Line’s non-voting revenues interest |  | $ | 2,721 |  |  | $ | 2,623 |  |  | $ | 5,337 |  |  | $ | 5,405 |
EAM's net income (1) |  | $ | 548 |  |  | $ | 386 |  |  | $ | 1,030 |  |  | $ | 852 |
Summary Investment Holdings [Table Text Block] |
|  | October 31, |  |  | April 30, |
($ in thousands) |  | 2023 |  |  | 2023 |
|  | (unaudited) |  |  |  |  |
EAM's total assets |  | $ | 61,729 |  |  | $ | 61,389 |
EAM's total liabilities (1) |  |  | (4,763 | ) |  |  | (4,357 | )
EAM's total equity |  | $ | 56,966 |  |  | $ | 57,032 |

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