Series A Convertible Preferred Stock (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Nov. 02, 2012	Dec. 31, 2012	Dec. 31, 2014
Preferred Stock [Line Items]
Preferred Stock Dividends, Shares	150	142
Warrant [Member]
Preferred Stock [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights	3.47
Series A Convertible Preferred Stock [Member]
Preferred Stock [Line Items]
Proceeds from Issuance of Private Placement			$ 4,500	$ 88
Preferred stock, shares outstanding	10,143		1,380,362		9,993
Issuance Of Warrants To Purchase Of Common Stock			2,760,724
Preferred Stock, Dividend Rate, Percentage			6.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 3.85
Preferred Stock Convertible Conversion Price			$ 3.26