Quarterly report pursuant to Section 13 or 15(d)

Stock Award Plans (Details)

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Stock Award Plans (Details)
9 Months Ended
Sep. 30, 2015
item
Stock Based Compensation  
Number of stock option plans 3
Employee Stock  
Stock Based Compensation  
Purchase price of common shares as a percentage of the fair market value on the first day of the offering period 85.00%
Purchase price of common shares as a percentage of the fair market value on the purchase date 85.00%