Summary of Significant Accounting Policies (Schedule Of Weighted Average Number Of Shares) (Details)	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Net Income per Share [Abstract]
Weighted average common shares outstanding - basic	4,855,504	4,851,460	4,839,810
Stock options	16,431	15,639	21,934
Warrants		592	1,802
Shares used in computing net income per share - diluted	4,871,935	4,867,691	4,863,546

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Warrant

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-Publisher FASB

-Name Accounting Standards Codification

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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