Stock Based Compensation (Tables) |
6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
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Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
* includes both stock grants and option grants
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Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table summarizes the Company’ stock option activity and related information for the period from December 31, 2016 to June 30, 2017 (number of options in thousands):
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Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
The following weighted-average assumptions were used to calculate share based compensation for the three and six months ended June 30, 2017 and 2016:
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