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Accounts Receivable and Unbilled Accounts Receivables
12 Months Ended
Dec. 31, 2011
Accounts Receivable and Unbilled Accounts Receivables [Abstract]  
Accounts Receivable and Unbilled Accounts Receivables [Text Block]
3. Accounts Receivable and Unbilled Accounts Receivables

 

Accounts receivable consist of the following at December 31:

 

    2011     2010  
             
Commercial     2,508,626       1,827,207  
Government     5,376,176       5,967,706  
                 
Accounts receivable, net   $ 7,884,802     $ 7,794,913  

 

Unbilled accounts receivable consist of the following at December 31:

 

    2011     2010  
             
Commercial     88,855       114,168  
Government     2,626,551       2,945,497  
                 
Unbilled accounts receivable   $ 2,715,406     $ 3,059,665  

 

As described further in Note 7 to the consolidated financial statements, our commercial revolving line of credit capacity is based on eligible accounts receivable (including unbilled accounts receivable) which are defined as customer balances aged less than 90 days.