Note 17 - Segment Information - Selected Operating Results (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 117,613	$ 117,438	$ 124,753
Income from operations	5,719	4,877	4,563
Home [Member]
Revenues	60,153	67,741	85,021
Income from operations	16,821	14,206	16,256
Unified Communications [Member]
Revenues	38,123	38,817	34,879
Income from operations	12,555	12,147	9,105
SmartVoice [Member]
Revenues	19,337	10,880	4,853
Income from operations	$ (23,657)	$ (21,476)	$ (20,798)

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration