Annual report pursuant to Section 13 and 15(d)

2. Receivables (Tables)

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2. Receivables (Tables)
12 Months Ended
Dec. 31, 2016
Receivables Tables  
Accounts receivable
    2016     2015  
Billed-federal government   $ 693,321     $ 754,540  
Billed-commercial and other     67,201       180,474  
Total billed     760,522       935,014  
Unbilled     396,865       363,015  
Allowance for doubtful accounts     -       -  
Accounts receivable, net   $ 1,157,387     $ 1,298,029