Note 16 - Segment Information - Selected Operating Results (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 124,753	$ 137,869	$ 144,271
Income from operations	4,563	9,564	9,646
Home [Member]
Revenues	85,021	95,388	121,714
Income from operations	16,256	17,715	24,815
Office [Member]
Revenues	34,879	26,590	22,216
Income from operations	9,105	(2,961)	(4,861)
SmartVoice [Member]
Revenues	4,853	15,891	341
Income from operations	$ (20,798)	$ (5,190)	$ (10,308)