Segment Information (Segment Income Statement Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended													6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013		Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,385	$ 7,530	[1]	$ 7,447	$ 7,740	$ 6,925	[2]	$ 7,050	[1],[2]	$ 6,886	[2]	$ 7,081	[2]			$ 30,102	$ 27,942	[2]	$ 25,936
Cost of services and products																13,465	14,134		14,701
Selling, general and administration expense		5,115		6,226	7,248									13,474	18,589	23,989	23,702		17,558
Impairment																	8,883
Loss on disposal and restructuring costs																447
Depreciation and amortization																3,815	5,476		5,266
Total operating expenses		9,629		10,402	12,039									22,441	32,070	41,716	52,195		37,525
Operating loss	(2,261)	(2,099)	[1]	(2,955)	(4,299)	(13,633)	[2]	(4,019)	[1],[2]	(3,447)	[2]	(3,154)	[2]	(7,254)	(9,353)	(11,614)	(24,253)	[2]	(11,589)
Interest income (expense), net																(756)	(415)		(64)
Income from equity method investment																13,000	11,021		7,898
Other income (expense), net																166	(286)		(51)
Income (loss) before income taxes		997		146	(1,177)									(1,031)	(34)	796	(13,933)		(3,806)
Unified Communications [Member]
Segment Reporting Information [Line Items]
Operating Revenues																15,834	13,569		8,360
Cost of services and products																8,798	8,994		6,590
Selling, general and administration expense																15,602	15,055		9,794
Loss on disposal and restructuring costs																447
Depreciation and amortization																2,287	2,037		1,132
Total operating expenses																27,134	26,086		17,516
Operating loss																(11,300)	(12,517)		(9,156)
Telephone [Member]
Segment Reporting Information [Line Items]
Operating Revenues																14,268	14,373		17,576
Cost of services and products																4,667	5,140		8,111
Selling, general and administration expense																8,387	8,647		7,764
Impairment																	8,883
Depreciation and amortization																1,528	3,439		4,134
Total operating expenses																14,582	26,109		20,009
Operating loss																$ (314)	$ (11,736)		$ (2,433)

[1] Included in operating loss and net loss is $0.4 million loss on disposal and restructuring costs.

[2] The Company recorded an additional $1.4 milion in tax expense, compared to what was previously reported in its Annual Report on Form 10-K/A for the year ended December 31, 2012 (see Note 1).