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Description of Business (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2013
Current Line of Credit
Jun. 24, 2013
Current Line of Credit
Jun. 30, 2013
Promissory note
G. Ward Paxton, chief executive officer
Feb. 07, 2013
Promissory note
G. Ward Paxton, chief executive officer
Description of Business                    
Minimum number of years for which local area networking equipment was provided     15 years              
Cash and cash equivalents $ 545,000 $ 149,000 $ 545,000 $ 149,000 $ 52,000 $ 308,000        
Net income 205,000 212,000 262,000 (140,000)            
Period during which the entity expects to have sufficient cash resources to finance its operations and capital expenditures     12 months              
Description of Business                    
Funding available             500,000   670,000  
Maximum borrowing capacity             $ 625,000 $ 625,000 $ 2,200,000 $ 2,200,000