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Summary Of Significant Accounting Policies (Concentration of Customers and Suppliers) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 12 Months Ended
Dec. 31, 2013
customer
Jan. 31, 2008
Oct. 31, 2011
HP [Member]
Dec. 31, 2013
HP [Member]
Dec. 31, 2012
HP [Member]
Dec. 31, 2013
Net Revenue [Member]
Customer Concentration Risk [Member]
Dec. 31, 2012
Net Revenue [Member]
Customer Concentration Risk [Member]
Dec. 31, 2011
Net Revenue [Member]
Customer Concentration Risk [Member]
Dec. 31, 2013
Net Revenue [Member]
Customer Concentration Risk [Member]
HP [Member]
Dec. 31, 2012
Net Revenue [Member]
Customer Concentration Risk [Member]
HP [Member]
Dec. 31, 2011
Net Revenue [Member]
Customer Concentration Risk [Member]
HP [Member]
Dec. 31, 2013
Net Revenue [Member]
Customer Concentration Risk [Member]
Tektronix [Member]
Dec. 31, 2012
Net Revenue [Member]
Customer Concentration Risk [Member]
Tektronix [Member]
Dec. 31, 2011
Net Revenue [Member]
Customer Concentration Risk [Member]
Tektronix [Member]
Dec. 31, 2013
Net Revenue [Member]
Customer Concentration Risk [Member]
Other customers less than 10% [Member]
Dec. 31, 2012
Net Revenue [Member]
Customer Concentration Risk [Member]
Other customers less than 10% [Member]
Dec. 31, 2011
Net Revenue [Member]
Customer Concentration Risk [Member]
Other customers less than 10% [Member]
Dec. 31, 2013
Accounts Receivable [Member]
HP [Member]
Dec. 31, 2012
Accounts Receivable [Member]
HP [Member]
Oct. 31, 2011
Common Stock [Member]
HP [Member]
Major customers                                        
Accounts Receivable, Gross       $ 27.2 $ 17.0                              
Number of major customers 2                                      
Concentration risk, percentage           100.00% 100.00% 100.00% 59.00% 68.00% 74.00% 13.00% 10.00% 6.00% 28.00% 22.00% 20.00% 63.00% 68.00%  
Product purchase agreement, period     5 years                                  
Warrants to purchase shares of our common stock                                       1,602,489
Warrants, exercise price   2.40                                   2.40