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Note 2 - Investments (Tables) | 3 Months Ended
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Jul. 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 |  |  | $ | 1,532 |  |  | $ | - |  |  | $ | 9,917 |
|  |  |  |  |  | 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 |  | $ | 8,705 |  |  | $ | 6 |  |  | $ | (7 | ) |  | $ | 8,704 |
Due 1 year through 5 years |  |  | 250 |  |  |  | - |  |  |  | (1 | ) |  |  | 249 |
Total investment in government debt securities |  | $ | 8,955 |  |  | $ | 6 |  |  | $ | (8 | ) |  | $ | 8,953 |
|  | 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 July 31, |
($ in thousands) |  | 2018 |  |  | 2017 |
Dividend income |  | $ | 67 |  |  | $ | 52 |
Interest income |  |  | 35 |  |  |  | 25 |
Other |  |  | 12 |  |  |  | 19 |
Total income from securities transactions, net |  | $ | 114 |  |  | $ | 96 |
Investment Holdings, Other than Securities [Table Text Block] |
|  | Three Months Ended July 31, |
($ in thousands) (unaudited) |  | 2018 |  |  | 2017 |
Investment management fees earned from the Value Line Funds, net of fee waivers |  | $ | 4,109 |  |  | $ | 3,958 |
12b-1 fees and other fees, net of fee waivers |  | $ | 1,704 |  |  | $ | 1,549 |
Other income |  | $ | 71 |  |  | $ | 55 |
Investment management fee waivers |  | $ | 111 |  |  | $ | 154 |
12b-1 fee waivers |  | $ | 159 |  |  | $ | 235 |
Value Line’s non-voting revenues interest |  | $ | 1,968 |  |  | $ | 1,978 |
EAM's net income (1) |  | $ | 606 |  |  | $ | 316 |
Summary Investment Holdings [Table Text Block] |
|  | July 31, |  |  | April 30, |
($ in thousands) |  | 2018 |  |  | 2018 |
|  | (unaudited) |  |  |  |  |
EAM's total assets |  | $ | 60,278 |  |  | $ | 60,203 |
EAM's total liabilities (1) |  |  | (3,378 | ) |  |  | (3,128 | )
EAM's total equity |  | $ | 56,900 |  |  | $ | 57,075 |

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