Basis Of Presentation And Significant Accounting Policies (Details)	Oct. 12, 2012	Oct. 31, 2012 Before Plan Amendment [Member]	Oct. 31, 2012 Before Plan Amendment [Member] Series A Participating Preferred Stock [Member]	Oct. 31, 2012 After Plan Amendment [Member]	Oct. 31, 2012 After Plan Amendment [Member] Series A Participating Preferred Stock [Member]
Number of stock purchase right for each outstanding common stock	1
Exercise price of stock purchase rights per unit		80		220
Number of shares designated under the plan			100,000		200,000