Note G - Significant Customers - Sales to Major Customers (Distributors) As a Percentage of Total Revenues (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
VTech Holdings Ltd [Member]
Concentration risk, percentage		23.00%	19.00%	21.00%	21.00%
Nexty Electronics Corporation [Member]
Concentration risk, percentage	[1],[2]	11.00%	11.00%	10.00%	9.00%
Ascend Technology Inc [Member]
Concentration risk, percentage	[1],[3]	17.00%	24.00%	31.00%	25.00%

[1] Distributor.

[2] Nexty Electronics sells the Company's products to a limited number of customers; one of those customers – Panasonic, accounted for 9% and 10% of the Company’s total revenues for the three month periods ended September 30, 2020 and 2019 respectively, and 9% and 8% of the Company’s total revenues for the nine month periods ended September 30, 2020 and 2019, respectively.

[3] Ascend Technology sells the Company’s products to a limited number of customers; one of those customers - Cisco Systems – accounted for 1% and 8% of the Company's total revenues for the three month periods ended September 30, 2020 and 2019, respectively, and 13% and 9% of the Company's total revenues for the nine month periods ended September 30, 2020 and 2019, respectively.