Summary Of Significant Accounting Policies (Concentration of Customers and Suppliers) (Details)	3 Months Ended
	Mar. 31, 2013 customer	Mar. 31, 2012
Major customers
Number of major customers	2
Concentration risk, percentage of total net revenues	100.00%	100.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | HP
Major customers
Concentration risk, percentage of total net revenues	63.00%	61.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Tektronix
Major customers
Concentration risk, percentage of total net revenues	12.00%	19.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Other customers less than 10%
Major customers
Concentration risk, percentage of total net revenues	25.00%	20.00%
Common Stock [Member] | HP
Major customers
Warrants to purchase shares of our common stock	1,602,489
Warrants, exercise price	2.40