Note F - Significant Customers - Sales to Major Customers (Distributors) As a Percentage of Total Revenues (Details) - Customer Concentration Risk [Member] - Sales Revenue, Net [Member]		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
VTech Holdings Ltd [Member]
Concentration risk, percentage		25.00%	29.00%	25.00%	30.00%
Nexty Electronics Corporation [Member]
Concentration risk, percentage	[1],[2]	12.00%	9.00%	11.00%	10.00%
Ascend Technology Inc [Member]
Concentration risk, percentage	[1],[3]	25.00%	20.00%	26.00%	21.00%

[1] Distributor.

[2] Nexty Electronics sells the Company's products to a limited number of customers; one of those customers – Panasonic, accounted for 10% and 8% of the Company’s total revenues for the three month periods ended June 30, 2018 and 2017 and 9% and 8% of the Company's total revenues for the six month periods ended June 30, 2018 and 2017.

[3] Ascend Technology sells the Company's products to a limited number of customers; however none of those customers accounted for more than 10% of the Company's total revenues for the three months periods ended March 31, 2018 and 2017 .