Business Acquisition (Narrative) (Details) (USD $)	12 Months Ended						0 Months Ended	5 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Oct. 22, 2012	Oct. 21, 2012	Aug. 05, 2011	Aug. 05, 2011 Alteva, LLC [Member]	Dec. 31, 2011 Alteva, LLC [Member]	Aug. 22, 2012 Alteva, LLC [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Aug. 22, 2012 Minimum [Member] Alteva, LLC [Member]	Dec. 31, 2012 Customer Relationships [Member]	Dec. 31, 2011 Customer Relationships [Member]	Dec. 31, 2012 Trade Name [Member]	Dec. 31, 2011 Trade Name [Member]
Business Acquisition [Line Items]
Purchase price						$ 17,818,000
Period of trading days prior to and after the record date	3 days
Period of trading days	30 days
Derivative liability, notional amount	1,600,000
Exercise price per share		$ 11.74
Advertising and promotional expenses	1,000,000	1,100,000	500,000
Goodwill	9,121,000	9,121,000
Intangible assets useful lives										15 years	3 years		8 years	8 years	15 years	15 years
Acquisition costs							800,000
Operating revenues		29,997,000	30,374,000					3,100,000
Net loss		(3,697,000)	1,960,000					700,000
Puttable common stock price per share		$ 13.45							$ 12.55			$ 14.68
Payment for puttable shares				$ 500,000	$ 400,000