Note M - Segment Information - Selected Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income from operations	$ 1,532	$ 2,960	$ 471	$ 1,598
Revenues	31,301	36,164	59,234	63,823
Home [Member]
Income from operations	4,564	4,843	7,909	6,321
Revenues	21,789	24,211	42,744	42,866
Office [Member]
Income from operations	2,429	(475)	3,044	(2,498)
Revenues	8,620	7,392	15,219	12,470
SmartVoice [Member]
Income from operations	(5,461)	(1,408)	(10,482)	(2,225)
Revenues	$ 892	$ 4,561	$ 1,271	$ 8,487