Stockholders’ Equity (Parenthetical) (Details 2)	12 Months Ended
	Dec. 31, 2015 $ / shares
Series B Preferred Stock [Member]
Preferred stock, liquidation Value per share	$ 4.00
Preferred stock, frequency of dividend payment	Quarterley
Preferred stock, dividend date of commencement	Mar. 31, 2101
Series C Preferred Stock [Member]
Preferred stock, liquidation Value per share	$ 3.00
Preferred stock, frequency of dividend payment	Quarterley
Preferred stock, dividend date of commencement	Mar. 31, 2002
Series D Preferred Stock [Member]
Preferred stock, liquidation Value per share	$ 10.00
Preferred stock, frequency of dividend payment	Quarterley
Preferred stock, dividend date of commencement	Apr. 30, 2002
Series E Preferred Stock [Member]
Preferred stock, liquidation Value per share	$ 22.00
Preferred stock, frequency of dividend payment	Quarterley
Preferred stock, dividend date of commencement	May 31, 2002
Series A Preferred Stock [Member]
Preferred stock, liquidation Value per share	$ 4.50