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Marketable Securities and Investments | 12 Months Ended
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May 31, 2016
Investments, Debt and Equity Securities [Abstract] |
MARKETABLE SECURITIES AND INVESTMENTS | MARKETABLE SECURITIES AND INVESTMENTS As of May 31, 2016, marketable securities consisted of the following:
| Amortized cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (in thousands)
Available-for-sales securities |  |  |  |  |  |  |
New York State government agency obligations | $ | 1,800 |  |  | $ | — |  |  | $ | (147 | ) |  | $ | 1,653 |
| $ | 1,800 |  |  | $ | — |  |  | $ | (147 | ) |  | $ | 1,653 |
As of May 31, 2015, marketable securities consisted of the following:
| Amortized cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
| (in thousands)
Available-for-sales securities |  |  |  |  |  |  |
New York State government agency obligations | $ | 1,825 |  |  | $ | — |  |  | $ | (136 | ) |  | $ | 1,689 |
| $ | 1,825 |  |  | $ | — |  |  | $ | (136 | ) |  | $ | 1,689 |
The amortized cost and fair value of marketable securities as of May 31, 2016, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
| Amortized cost |  | Fair Value
| (in thousands)
As of May 31, 2016: |  |  |
Due in one year or less | $ | — |  |  | $ | — |
Due after one through five years | — |  |  | — |
Due after five through twenty years | 1,800 |  |  | 1,653 |
| $ | 1,800 |  |  | $ | 1,653 |

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