Note 17 - Segment Information (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 17 - Segment Information (Details) [Line Items]
Number of Reportable Segments	3
Telephony [Member] | Sales Revenue, Segment [Member] | Product Concentration Risk [Member] | Home [Member]
Note 17 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage	72.00%	79.00%	85.00%
Gateway [Member] | Sales Revenue, Segment [Member] | Product Concentration Risk [Member] | Home [Member]
Note 17 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage	10.00%	8.00%	6.00%
VoIP [Member] | Sales Revenue, Segment [Member] | Product Concentration Risk [Member] | Office [Member]
Note 17 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage	15.00%	10.00%	6.00%