Redeemable Convertible Preferred Stock (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Temporary Equity [Line Items]
Preferred Stock, Shares Authorized	1,000,000
Series G Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 1,000
Convertible Preferred Stock, Terms of Conversion	convertible into common stock at a conversion price equal to 85% of the lowest sale price of the common stock on its listed market over the five trading days preceding the date of conversion ("Beneficial Conversion Feature"), subject to a maximum conversion price.
Preferred Stock, Shares Outstanding	1,321,537	1,238,941
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Preferred Stock, Liquidation Preference, Value	$ 168,496