| Apr 30,
2016 | Apr 30,
2017 | Apr 30,
2018 | Apr 30,
2019 | Apr 30,
2020 | Apr 30,
2021 | Apr 30,
2022 | Apr 30,
2023 |
|---|
| Cash and cash equivalents | 13 | 7 | 6 | 6 | 5 | 19 | 30 | 8 |
|---|
| Equity securities | - | - | - | - | - | 24 | 18 | 15 |
|---|
| Available-for-sale Fixed Income securities | - | - | - | - | - | 3 | 10 | 40 |
|---|
| Accounts receivable, net of allowance for doubtful accounts of $36 and $31, respectively | 1 | 1 | 1 | 2 | 4 | 4 | 2 | 2 |
|---|
| Prepaid and refundable income taxes | 0 | 0 | 0 | 0 | - | 1 | 1 | 0 |
|---|
| Prepaid expenses and other current assets | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Total current assets | 20 | 26 | 27 | 31 | 41 | 51 | 61 | 66 |
|---|
| Investment in EAM Trust | 58 | 58,223,000 | 58,233,000 | 58,625,000 | 59,165,000 | 60,977,000 | 60 | 59 |
|---|
| Restricted money market investments | - | 469,000 | 469,000 | 469,000 | 469,000 | 469,000 | 0 | 0 |
|---|
| Property and equipment, net | 4 | 1 | 1 | 1 | 10 | 8 | 7 | 6 |
|---|
| Capitalized software and other intangible assets, net | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Total long term assets | 67 | 61 | 60 | 60 | 69 | 70 | 67 | 65 |
|---|
| Total assets | 87 | 87 | 87 | 92 | 110 | 121 | 129 | 131 |
|---|
| Accounts payable and accrued liabilities | 3 | 1 | 2 | 2 | 2 | 2 | 1 | 1 |
|---|
| Accrued salaries | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Dividends payable | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 |
|---|
| Accrued taxes on income | 0 | 0 | - | 0 | 1 | - | 0 | 0 |
|---|
| Operating lease obligation-short term | - | - | - | - | 1 | 1 | 1 | 1 |
|---|
| Unearned revenue | - | - | - | 20 | 19 | 19 | 18 | 17 |
|---|
| Total current liabilities | 26 | 25 | 25 | 25 | 27 | 28 | 24 | 23 |
|---|
| Unearned revenue | 5 | 5 | 6 | 5 | 6 | 6 | 6 | 6 |
|---|
| Operating lease obligation-long term | - | - | - | - | 8 | 7 | 6 | 5 |
|---|
| Deferred income taxes | - | - | - | - | 13 | 13 | 13 | 13 |
|---|
| Total long term liabilities | 26 | 25 | 18 | 19 | 29 | 26 | 25 | 24 |
|---|
| Total liabilities | 52 | 49 | 43 | 44 | 56 | 54 | 49 | 47 |
|---|
| Common stock, $0.10 par value; authorized 30,000,000 shares; issued 10,000,000 shares | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Additional paid-in capital | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| Retained earnings | 36 | 39 | 45 | 49 | 56 | 73 | 88 | 96 |
|---|
| Treasury stock, at cost (565,460 shares and 490,157 shares, respectively) | - | - | - | - | - | - | - | 15 |
|---|
| Accumulated other comprehensive income, net of tax | 0 | 0 | 1 | 2 | 1 | 0 | -0 | 0 |
|---|
| Total shareholders' equity | 35 | 38 | 44 | 48 | 54 | 67 | 80 | 84 |
|---|
| Total liabilities and shareholders' equity | 87 | 87 | 87 | 92 | 110 | 121 | 129 | 131 |
|---|