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Secured Credit Facility (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 23, 2008
Mar. 19, 2008
NU Telecom Dividends payable 2,050,000    
Covenant compliance

Our loan agreements include restrictions on our ability to pay cash dividends to our stockholders. However, we are allowed to pay dividends (a) (i) in an amount up to $2,050,000 in any year and (ii) in any amount if our "Total Leverage Ratio," that is, the ratio of our "Indebtedness" to "EBITDA" (in each case as defined in the loan documents) is equal to or less than 3:50 to 1:00, and (b) in either case if we are not in default or potential default under our loan agreements. As of December 31, 2010, our Total Leverage Ratio fell below the 3:50 to 1:00 ratio, thus eliminating any restrictions on our ability to pay cash dividends to our stockholders. As of June 30, 2012, we made advances on our revolving credit facility, which caused our Total Leverage Ratio to exceed the 3:50 to 1:00 ratio, thereby temporarily reinstating the restrictions on dividends. Our management believes that these short-term borrowings will be repaid by September 30, 2012 and our Total Leverage Ratio will be below the 3:50 to 1:00 ratio, thus eliminating any restrictions on our ability to pay cash dividends to our stockholders.

   
Aggregate indebtedness $ 36.0 $ 6.0 $ 39.0
Weighted average interest rate 5.52%    
Additional borrowings 11.9    
Currently outstanding 7.7    
Effective weighted average interest rate 2.26%    
Revolving Credit Facility [Member]
      
Available under credit facilities $ 4.2