Shareholders' Equity (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014
Class of Warrant or Right [Line Items]
Preferred Stock Purchase Right, Each Share of Common Stock Outstanding at aSpecified Date has the Right to Purchase a Stated Percentage of Specified Preferred Stock, Stated Percentage	1.00%
Shareholder Rights Plan (Textual) [Abstract]
Market Value as a Percentage of Exercise Price, Percentage	200.00%
Preferred Stock Purchase Right, Duration in Which the Company May Redeem Purchase Right, Business Days Following the First Public Announcement of an Acquisition	10 days
Right plan
Shareholder Rights Plan (Textual) [Abstract]
Declared dividend of right for each outstanding common share	1
Preferred stock purchase right for each outstanding common share	1
Percentage of common stock owned without board approval	10.00%
Redemption Price Per Right	0.001
Preferred Stock Purchase Right, Duration in Which the Company May Redeem Purchase Right, Business Days Following the First Public Announcement of an Acquisition	10 days
Right plan | Series B Junior Preferred Stock
Shareholder Rights Plan (Textual) [Abstract]
Class of Warrant or Right, Exercise Price	54.00