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Note 2 - Investments (Tables) | 6 Months Ended
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Oct. 31, 2018
Notes Tables |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  |  |  |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
ETFs - equities |  | $ | 8,385 |  |  | $ | 1,225 |  |  | $ | (4 | ) |  | $ | 9,606 |
|  |  |  |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
ETFs - equities |  | $ | 8,385 |  |  | $ | 994 |  |  | $ | - |  |  | $ | 9,379 |
|  | Amortized |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Historical Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within 1 year |  | $ | 6,455 |  |  | $ | 17 |  |  | $ | (7 | ) |  | $ | 6,465 |
Due 1 year through 5 years |  |  | 3,000 |  |  |  | - |  |  |  | (11 | ) |  |  | 2,989 |
Total investment in government debt securities |  | $ | 9,455 |  |  | $ | 17 |  |  | $ | (18 | ) |  | $ | 9,454 |
|  | Amortized |  |  | Gross Unrealized |  |  | Gross Unrealized |  |  |  |  |
($ in thousands) |  | Historical Cost |  |  | Holding Gains |  |  | Holding Losses |  |  | Fair Value |
Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within 1 year |  | $ | 7,868 |  |  | $ | 10 |  |  | $ | (12 | ) |  | $ | 7,866 |
Due 1 year through 5 years |  |  | 600 |  |  |  | - |  |  |  | (1 | ) |  |  | 599 |
Total investment in government debt securities |  | $ | 8,468 |  |  | $ | 10 |  |  | $ | (13 | ) |  | $ | 8,465 |
Investment Income [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
($ in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Dividend income |  | $ | 62 |  |  | $ | 53 |  |  | $ | 129 |  |  | $ | 105 |
Interest income |  |  | 49 |  |  |  | 25 |  |  |  | 84 |  |  |  | 51 |
Other |  |  | 12 |  |  |  | 13 |  |  |  | 24 |  |  |  | 31 |
Total income from securities transactions, net |  | $ | 123 |  |  | $ | 91 |  |  | $ | 237 |  |  | $ | 187 |
Investment Holdings, Other than Securities [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
($ in thousands) (unaudited) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Investment management fees earned from the Value Line Funds, net of fee waivers |  | $ | 4,181 |  |  | $ | 4,068 |  |  | $ | 8,290 |  |  | $ | 8,026 |
12b-1 fees and other fees, net of fee waivers |  | $ | 1,727 |  |  | $ | 1,619 |  |  | $ | 3,431 |  |  | $ | 3,168 |
Other income |  | $ | (27 | ) |  | $ | 49 |  |  | $ | 44 |  |  | $ | 104 |
Investment management fee waivers |  | $ | 110 |  |  | $ | 107 |  |  | $ | 221 |  |  | $ | 261 |
12b-1 fee waivers |  | $ | 175 |  |  | $ | 179 |  |  | $ | 334 |  |  | $ | 414 |
Value Line’s non-voting revenues interest |  | $ | 2,095 |  |  | $ | 2,039 |  |  | $ | 4,063 |  |  | $ | 4,017 |
EAM's net income (1) |  | $ | 578 |  |  | $ | 396 |  |  | $ | 1,184 |  |  | $ | 712 |
Summary Investment Holdings [Table Text Block] |
|  | October 31, |  |  | April 30, |
($ in thousands) |  | 2018 |  |  | 2018 |
|  | (unaudited) |  |  |  |  |
EAM's total assets |  | $ | 60,284 |  |  | $ | 60,203 |
EAM's total liabilities (1) |  |  | (3,303 | ) |  |  | (3,128 | )
EAM's total equity |  | $ | 56,981 |  |  | $ | 57,075 |

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