Current Vulnerability Due to Certain Concentrations (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
Current Vulnerability Due To Certain Concentrations 1	10.00%
Current Vulnerability Due To Certain Concentrations 2	11.00%
Current Vulnerability Due To Certain Concentrations 3	11.00%
Current Vulnerability Due To Certain Concentrations 4	$ 0
Current Vulnerability Due To Certain Concentrations 5	$ 0