Note 4 - Concentrations

12 Months Ended

Dec. 31, 2014

Risks and Uncertainties [Abstract]

Concentration Risk Disclosure [Text Block]

4. Concentrations

Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents and trade accounts receivable. The Company extends differing levels of credit to customers and does not require collateral deposits. As of December 31, 2014 and 2013, the Company has allowance for doubtful accounts of $165 and $152, respectively. As of December 31, 2014, the Company has allowance for distributors’ price discount of $2,206.

The following table summarizes the significant customers’ and distributors’ accounts receivable and revenue as a percentage of total accounts receivable and total revenue, respectively:

	December 31,
Accounts Receivable	2014		2013
Customer A		*		11%
Customer B		*		*
Customer C		18%		*

	Year Ended December 31,
Revenue	2014		2013		2012
Customer A		13%		12%		19%
Customer B		*		15		15
Customer C		*		*		*

* Less than 10% of total accounts receivable or total revenue

Certain other customers are distributors that sell the Company’s products exclusively to what would be a “Customer D” above if we were able to include the sales made to those distributors. In the aggregate, revenue to such end customer, including revenue made through distributors as a percentage of total revenue was 11% and 14% for the years ended December 31, 2013 and 2012, respectively. In addition, certain other customers are subcontractors of customers A and B above. In the aggregate, revenue to Customer A, including its subcontractors as a percentage of total revenue was 18%, 20% and 23% for the years ended December 31, 2014, 2013 and 2012, respectively. In the aggregate, revenue to Customer B, including its subcontractor as a percentage of total revenue was 16% and 15% for the years ended December 31, 2013 and 2012, respectively.