Segment Information (Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 segment	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Assets	$ 40,220		$ 40,220		$ 43,445
Operating Revenues	7,530	7,050	22,717	21,017
Cost of services and products	3,154	3,428	10,158	10,410
Selling, general and administration expense	5,218	6,230	18,899	17,241
Loss on disposal and restructuring costs	404		404
Depreciation and amortization	956	1,411	2,919	3,986
Total operating expenses	9,732	11,069	32,380	31,637
Operating income (loss)	(2,202)	(4,019)	(9,663)	(10,620)
Number of segments			2
Unified Communications [Member]
Segment Reporting Information [Line Items]
Assets	22,383		22,383		23,500
Operating Revenues	4,043	3,621	11,919	10,147
Cost of services and products	2,009	2,165	6,594	6,669
Selling, general and administration expense	3,598	4,179	12,202	11,215
Loss on disposal and restructuring costs	404		404
Depreciation and amortization	595	529	1,777	1,423
Total operating expenses	6,606	6,873	20,977	19,307
Operating income (loss)	(2,563)	(3,252)	(9,058)	(9,160)
Telephone [Member]
Segment Reporting Information [Line Items]
Assets	17,837		17,837		19,945
Operating Revenues	3,487	3,429	10,798	10,870
Cost of services and products	1,145	1,263	3,564	3,741
Selling, general and administration expense	1,620	2,051	6,697	6,026
Depreciation and amortization	361	882	1,142	2,563
Total operating expenses	3,126	4,196	11,403	12,330
Operating income (loss)	$ 361	$ (767)	$ (605)	$ (1,460)