Summary Of Significant Accounting Policies (Concentration of Customers and Suppliers) (Details)	3 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012 customer	Jun. 30, 2011	Jun. 30, 2012 customer	Jun. 30, 2011	Oct. 31, 2011 Hewlett Packard	Jun. 30, 2012 Net revenue Customer concentration risk Hewlett Packard	Jun. 30, 2011 Net revenue Customer concentration risk Hewlett Packard	Jun. 30, 2012 Net revenue Customer concentration risk Hewlett Packard	Jun. 30, 2011 Net revenue Customer concentration risk Hewlett Packard	Jun. 30, 2012 Net revenue Customer concentration risk Tektronix	Jun. 30, 2011 Net revenue Customer concentration risk Tektronix	Jun. 30, 2012 Net revenue Customer concentration risk Tektronix	Jun. 30, 2011 Net revenue Customer concentration risk Tektronix	Jun. 30, 2012 Net revenue Customer concentration risk Other customers less than 10%	Jun. 30, 2011 Net revenue Customer concentration risk Other customers less than 10%	Jun. 30, 2012 Net revenue Customer concentration risk Other customers less than 10%	Jun. 30, 2011 Net revenue Customer concentration risk Other customers less than 10%	Oct. 31, 2011 Common stock Hewlett Packard
Net revenue by major customer
Number of major customers, greater than 10% of total revenue	2		2
Concentration risk, percentage of total net revenues	100.00%	100.00%	100.00%	100.00%		72.00%	77.00%	66.00%	77.00%	7.00%	5.00%	13.00%	4.00%	21.00%	18.00%	21.00%	19.00%
Product purchase agreement, period					5 years
Warrants to purchase shares of our common stock																		1,602,489
Exercise price (in dollars per share)																		2.40