Shareholders' Equity (Detail Textuals 3) - Rights Plan	12 Months Ended
	Dec. 31, 2016 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of beneficial ownership	25% or more
Number of business days	10 days
Exercise price	$ 32
Right entitle to purchase, description	Each right would entitle the holder to purchase one one-hundredth of a share of Series A Junior Participating Preferred Stock.
Shareholders rights plan, description	Exchange two shares of common stock or two one-hundredths of a share of preferred stock for each right