Note N - Segment Information - Selected Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 26,020	$ 31,042	$ 82,595	$ 88,352
Income from operations	1,414	2,190	2,040	4,451
Home [Member]
Revenues	16,235	16,124	44,496	45,772
Income from operations	5,096	4,699	12,935	12,936
Unified Communications [Member]
Revenues	2,585	9,955	22,968	28,161
Income from operations	304	3,592	7,341	9,143
SmartVoice [Member]
Revenues	7,200	4,963	15,131	14,419
Income from operations	$ (3,986)	$ (6,101)	$ (18,236)	$ (17,628)