Segment Information (Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total operating revenues	$ 27,942	$ 25,936	$ 24,426
Total depreciation and amortization	5,476	5,266	5,780
Total segment operating loss, exclusive of impairment loss	(15,370)	(11,589)	(6,388)
Impairment loss assets	(8,883)		(2,283)
Interest income, (expense), net	(415)	(64)	33
Income from equity method investment	11,021	7,898	12,578
Other (expenses) income, net	(286)	(51)	261
Income before income taxes	(13,933)	(3,806)	4,201
Segment assets	43,445	57,916
Unified Communications [Member]
Segment Reporting Information [Line Items]
Total operating revenues	13,569	8,360	4,527
Total depreciation and amortization	2,037	1,132	1,007
Total segment operating loss, exclusive of impairment loss	(12,517)	(9,156)	(2,450)
Segment assets	23,500	21,485
Telephone [Member]
Segment Reporting Information [Line Items]
Total operating revenues	14,373	17,576	19,899
Total depreciation and amortization	3,439	4,134	4,773
Total segment operating loss, exclusive of impairment loss	(2,853)	(2,433)	(3,938)
Segment assets	$ 19,945	$ 36,431