Equity (Details 8)	12 Months Ended
	Dec. 31, 2013 right	Dec. 31, 2012
Rights plan
Maximum percentage of beneficial ownership in entity's common stock used in calculating the period of time in which the Board of Directors may elect to exchange each Right for consideration per Right	50.00%
Consideration per right to exchange each right to common shares, expressed as a fraction of the number of common shares issuable at time of exercise of a right	0.5
Number of rights per common share	1
Redemption price per right (in dollars per right)	0.0025
Number of days following public announcement that a person or group has acquired beneficial ownership of 15% of more of the entity's outstanding common stock shares for the rights to become exercisable (in number of days)		10 days
Beneficial ownership by a person or group of affiliated persons before rights become exercisable (as a percent)		(15.00%)
Number of days following the commencement of a tender offer or exchange offer resulting in a person or group becoming an Acquiring Person for the rights to become exercisable (in number of days)		10 days
Series A Preferred Stock
Rights plan
Fraction of newly issued share of Series A Preferred Stock (or in some cases, shares of the Company's common stock, other securities, cash or other assets) that could be purchased, for each Right	0.001
Purchase price per share (in dollars per share)	225