Annual report pursuant to Section 13 and 15(d)

3. Receivables (Details)

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3. Receivables (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Allowance for doubtful accounts $ 0 $ 0
Accounts receivable, net 652,839 615,714
Billed-federal government    
Accounts receivable gross 612,679 560,942
Billed-commercial and other    
Accounts receivable gross 40,160 49,240
Total billed    
Accounts receivable gross 652,839 610,182
Unbilled    
Accounts receivable gross $ 0 $ 5,532