Summary Of Significant Accounting Policies Concentration of Customers and Suppliers (Details)	3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012 customer	Sep. 30, 2011	Sep. 30, 2012 customer	Sep. 30, 2011	Oct. 31, 2011 HP	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] HP	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] HP	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] HP	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] HP	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Tektronix	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Tektronix	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Tektronix	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Tektronix	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Other customers less than 10%	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Other customers less than 10%	Sep. 30, 2012 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Other customers less than 10%	Sep. 30, 2011 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] Other customers less than 10%	Oct. 31, 2011 Common Stock [Member] HP
Major customers
Number of major customers	2		2
Concentration risk, percentage of total net revenues	100.00%	100.00%	100.00%	100.00%		68.00%	73.00%	67.00%	76.00%	4.00%	7.00%	10.00%	5.00%	28.00%	20.00%	23.00%	19.00%
Product purchase agreement, period					5 years
Warrants to purchase shares of our common stock																		1,602,489
Warrants, exercise price																		2.40