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Stockholders Equity (Details 4)
Mar. 31, 2013
Number of stock options outstanding under prior plans  
Options outstanding 1,631,945
2000 Stock Option Plan [Member]
 
Number of stock options outstanding under prior plans  
Options outstanding 216,392
2002 Stock Option Plan [Member]
 
Number of stock options outstanding under prior plans  
Options outstanding 230,419
2006 Stock Option Plan [Member]
 
Number of stock options outstanding under prior plans  
Options outstanding 49,000
2010 Stock Option Plan [Member]
 
Number of stock options outstanding under prior plans  
Options outstanding 1,136,134