Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Mar. 31, 2013
Summary of Significant Accounting Policies [Abstract]  
Schedule Of Weighted Average Number Of Shares
Year Ended March 31
2013 2012 2011
Weighted average common shares outstanding – basic 4,839,810 4,796,227 4,729,035
Effect of dilutive securities:
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