Business Acquisition (Schedule Of Business Combination Consideration Allocation) (Details) (USD $)	12 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Aug. 05, 2011		Aug. 05, 2011 CoBank ACB, Unsecured Term Credit Facility [Member]	Dec. 31, 2011 Alteva, LLC [Member]	Dec. 31, 2012 Alteva, LLC [Member]	Aug. 05, 2012 Alteva, LLC [Member]
Cash				$ 10,250,000	[1]	$ 5,000,000
Issued puttable common stock				4,125,000	[2]
Contingent consideration payable				1,929,000	[3]				2,000,000
Hold-back payable				750,000	[4]
Working capital adjustment payable				648,000	[5]		200,000
Price protection				116,000	[6]
Total consideration				17,818,000
Common stock, issued shares	6,576,542	6,217,839					247,331	272,479
Working capital adjustment repaid							500,000
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

[1] $5.0 million of this amount was borrowed from CoBank, ACB (see Note 13).

[2] The Company issued 272,479 shares of the Company's common stock to the members of Alteva, LLC with an embedded put option. The terms of the lock-up and put agreement were subsequently revised in 2012 as noted below.

[3] Up to a total of $2.0 million in cash was payable to Alteva, LLC. The Company paid off the liability of $2.0 million as of December 31, 2012.

[4] This hold-back amount, withheld at closing, was payable to Alteva, LLC on August 5, 2012, less any amounts offset against such amount pursuant to the terms of the Alteva Agreement.

[5] Working capital adjustment was payable to Alteva, LLC pursuant to the terms of the Alteva Agreement. As of December 31, 2011, the Company had repaid $0.5 million to Alteva, LLC., with the remaining $0.2 million being repaid as of December 31, 2012.

[6] The purchase price protection provided that if the price of the Company's common stock for the 30 trading days immediately prior to October 21, 2012 or December 15, 2012 (but excluding the three trading days prior to and after the record date for any cash dividend declared by the Company) (the "Release Date Price") was less than $11.74, then the Company would issue to the Alteva, LLC members the aggregate number of shares of the Company's common stock equal to the difference between $1.6 million and the market value of 50% of the aggregate Alteva Shares on October 21, 2012 or December 15, 2012, or 100% of the aggregate Alteva Shares if the Release Date Price is less than $11.74 on both dates. The Company recorded the valuation of the price protection derivative liability using a binomial method based on significant inputs not observed in the market and thus represented a Level 3 instrument. Level 3 instruments are valued based on unobservable inputs that are supported by little or no market activity and reflect the Company's own assumptions in measuring fair value.