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Summary of Significant Accounting Policies (Schedule Of Weighted Average Number Of Shares) (Details)
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12 Months Ended | ||
|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2011
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| Net Income per Share [Abstract] | |||
| Weighted average common shares outstanding - basic | 4,839,810 | 4,796,227 | 4,729,035 |
| Stock options | 21,934 | 60,075 | 108,121 |
| Warrants | 1,802 | 7,169 | 7,110 |
| Shares used in computing net income per share - diluted | 4,863,546 | 4,863,471 | 4,844,266 |