Concentration of Credit Risk (Details Textual)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Percentage Of Trade Accounts Receivable	55.00%	60.00%
Customer One [Member] | Sales Revenue [Member]
Concentration Risk, Percentage	18.00%	22.00%
Customer One [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	25.00%	20.00%
Customer Two [Member] | Sales Revenue [Member]
Concentration Risk, Percentage	14.00%	14.00%
Customer Two [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	17.00%	19.00%
Customer Three [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	14.00%
Foreign Tax Authority [Member] | Sales Revenue [Member]
Concentration Risk, Percentage	5.00%	3.00%