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SUMMARY OF PER SHARE INFORMATION (Tables) | 6 Months Ended
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Sep. 30, 2012
SUMMARY OF PER SHARE INFORMATION [Abstract] |
Summary of per share data | The following presents a summary of per share data for the three and six months ended September 30, 2012 and 2011.
|  | Three Months Ended September 30, |  |  | Six Months Ended September 30 |
Per Share Data |  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Investment income |  | $ | .35 |  |  | $ | .34 |  |  | $ | .74 |  |  | $ | .65 |
Operating expenses |  |  | (.37 | ) |  |  | (.32 | ) |  |  | (.75 | ) |  |  | (.63 | )
Income taxes |  |  | (.01 | ) |  |  | (.01 | ) |  |  | (.01 | ) |  |  | (.01 | )
Net investment income |  |  | (.03 | ) |  |  | .01 |  |  |  | (.02 | ) |  |  | .01 |
Distributions from undistributed net investment income |  |  | – |  |  |  | – |  |  |  | (18.00 | ) |  |  | (.40 | )
Net realized gain net of tax |  |  | – |  |  |  | 4.88 |  |  |  | 17.62 |  |  |  | 3.31 |
Net increase (decrease) in unrealized appreciation of investments |  |  | 13.26 |  |  |  | (11.74 | ) |  |  | (7.43 | ) |  |  | (12.95 | )
Exercise of employee stock options |  |  | – |  |  |  | (.03 | ) |  |  | (.74 | ) |  |  | (.03 | )
Stock option expense |  |  | – |  |  |  | .07 |  |  |  | .08 |  |  |  | .13 |
Other* |  |  | (.31 | ) |  |  | – |  |  |  | (.31 | ) |  |  | – |
Increase (decrease) in net asset value |  |  | 12.92 |  |  |  | (6.81 | ) |  |  | (8.8 | ) |  |  | (9.93 | )
Net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of period |  |  | 145.73 |  |  |  | 140.56 |  |  |  | 167.45 |  |  |  | 143.68 |
End of period |  | $ | 158.65 |  |  | $ | 133.75 |  |  | $ | 158.65 |  |  | $ | 133.75 |
*Reflects impact of the different share amounts as a result of issuance or forfeiture of restricted stock during the period.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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