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Note 2 - Investments - Components of EAM's Investment Management Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017
Revenues |  | $ 9,051 | $ 8,989 | $ 18,022 | $ 17,903
Value Line’s non-voting revenues interest |  | 2,095 | 2,039 | 4,063 | 4,017
EAM's net income (1) |  | 3,302 | 2,072 | 6,406 | 4,287
EAM Trust [Member] |  |  |  |  |
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) | [1] | 578 | 396 | 1,184 | 712
EAM Trust [Member] | Investment Advice [Member] |  |  |  |  |
Revenues |  | 4,181 | 4,068 | 8,290 | 8,026
EAM Trust [Member] | Distribution and Shareholder Service [Member] |  |  |  |  |
Revenues |  | $ 1,727 | $ 1,619 | $ 3,431 | $ 3,168
[1] | Represents EAM's net income, after giving effect to Value Line's non-voting revenues interest, but before distributions to voting profits interest holders and to the Company in respect of its 50% non-voting profits interest.

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