Segment Information (Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Segment assets	$ 43,054		$ 43,445
Segment net revenues	7,740	7,081
Segment depreciation and amortization	1,002	1,279
Segment operating loss	(4,403)	(3,154)
Interest income, (expense), net	(236)	(57)
Income from equity method investment	3,250	1,425
Other (expenses) income, net	108	(5)
Loss before income taxes	(1,281)	(1,791)
Telephone [Member]
Segment Reporting Information [Line Items]
Segment assets	18,161		19,945
Segment net revenues	3,784	3,807
Segment depreciation and amortization	384	852
Segment operating loss	(430)	(383)
Unified Communications [Member]
Segment Reporting Information [Line Items]
Segment assets	24,893		23,500
Segment net revenues	3,956	3,274
Segment depreciation and amortization	618	427
Segment operating loss	$ (3,973)	$ (2,771)