Consolidated Statements of Cash Flows (Parenthetical)	12 Months Ended
	Dec. 31, 2015
Percentage of dividend on convertible preferred stock	1.50%
10% Convertible Notes Payable [Member]
Percentage of dividend on convertible preferred stock	10.00%
Series G 1.5% Convertible Preferred Stock [Member]
Percentage of dividend on convertible preferred stock	1.50%