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Debt (Term Loan and Revolving Line of Credit) (Details) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2010
Jul. 31, 2009
Dec. 31, 2010
Dec. 31, 2010
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2011
Jul. 31, 2010
Apr. 30, 2010
Jun. 30, 2013
Line of Credit [Member]
Dec. 31, 2012
Line of Credit [Member]
Mar. 30, 2012
Line of Credit [Member]
Mar. 31, 2012
Loans Payable [Member]
Dec. 31, 2012
Loans Payable [Member]
Jun. 30, 2013
Loans Payable [Member]
Mar. 30, 2012
Loans Payable [Member]
Debt Instrument [Line Items]                                  
Line of credit facility, maximum borrowing capacity                         $ 5,000,000        
Current borrowing capacity                     3,200,000 2,900,000          
Line of Credit Facility, Amount Outstanding                     1,200,000 1,300,000          
Term loan, payment terms                          

Payments on the term loan were originally interest-only for the first 10 months, which has since been extended to 12 months pursuant to terms of the agreement. Subsequently, the term loan will fully amortize over its remaining term

      
Line of credit borrowing capacity description                      

Under the terms of the revolving line of credit, the Company may draw down from the revolving line of credit up to 85% of qualified billed accounts receivable and 80% of qualified unbilled accounts receivable.

          
Term loan and line of credit, maturity date                       2015-09          
Line of credit facility borrowing capacity, qualified billed accounts receivable, percent                       85.00%          
Line of credit facility borrowing capacity, qualified unbilled accounts receivable, percent                       80.00%          
Fixed interest rate                             10.14%    
Adjustable interest rate, reference rate, floor percentage 1.5%                     1.50% 1.50%          
Loan payable, interest rate spread                     5.00% 5.00%          
Incremental borrowing rate used to calculate discount                     6.50% 6.50%          
2013                             749,997 499,998  
2014                             999,996 999,996  
2015                             750,007 750,007  
Total           2,500,000                 2,500,000 2,250,001 2,500,000
Prepayment premium, if paid within the first two years of the term loan, percent                             3.00%    
Prepayment premium, if paid after the first two years of the term loan, percent                             2.00%    
Final payment fee payable on term loan balance, percent                             3.00%    
Warrants issued to purchase common stock, in connection to loan agreement                             46,584    
Warrant exercise price               3.50 1.63 1.89         1.61    
Stock issued of convertible notes and stock purchase warrants, Value   19,300,000                              
Conversion of July 2009 Convertible Debt 17,000,000   4,800,000 21,830,337                          
Conversion of July 2009 Convertible Debt (in shares) 6,700,000   1,900,000                            
Debt conversion, price per share     $ 2.54 $ 2.54                          
Early Conversion offer expense     1,100,000                            
Convertible note payable, cash paid     11,000 11,000                          
Interest expense related to convertible notes       5,800,000                          
Current portion of long term debt         999,996 749,997                       
Long term debt, less current portion         1,217,791 1,704,108                       
Long-term borrowings           2,500,000                      
Debt discount                     $ 32,214