Note 6 - Significant Customers (Details) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
VTech Holdings Ltd. [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	32.00%	31.00%
Guo Wei Electronics [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	7.00%	11.00%
Samsung Mobile [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	14.00%	0.00%
Ascend Technology Inc [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	15.00%	15.00%
Tomen Electronics Corporation [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	9.00%	14.00%
Panasonic Communications Corporation [Member]
Note 6 - Significant Customers (Details) [Line Items]
Concentration Risk, Percentage	6.00%	11.00%