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Significant Customers and Concentration of Credit Risk Significant Customers and Concentration of Credit Risk (Tables)
6 Months Ended
Jun. 30, 2014
Risks and Uncertainties [Abstract]  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Sales to the following customers represented 10% or more of net revenue during at least one of the periods are presented as follows:

 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
Customer
 
2014
 
2013
 
2014
 
2013
Customer A
 
38
%
 
%
 
45
%
 
%
Customer B
 
31
%
 
%
 
22
%
 
%
Customer C
 
7
%
 
%
 
10
%
 
%
Customer D
 
14
%
 
%
 
8
%
 
%
Customer E
 
5
%
 
%
 
10
%
 
%

The following customers represented 10% or more of total accounts receivable as of at least one of the balance sheet dates presented:

 
 
June 30, 2014
 
December 31, 2013
Customer
 
(Unaudited)
 
Customer A
 
28
%
 
25
%
Customer B
 
45
%
 
11
%
Customer C
 
6
%
 
54
%
Customer D
 
11
%
 
7
%

Our gross revenue is affected by the timing of customer orders, which timing sometimes results in quarter-to-quarter fluctuations in gross revenue. From time to time we have offered favorable pricing and extended payment terms to new wholesale distributor customers as an incentive to place initial Abstral orders. In the second quarter of 2014, we afforded such incentives to one of our principal customers with respect to an order from which we recognized approximately $1.5 million of gross revenue (ex-manufacturer), or approximately $0.9 million of net revenue.