2. Receivables (Tables)

12 Months Ended

Dec. 31, 2012

Receivables Tables

Accounts receivable

Accounts receivable at December 31, 2012 and 2011, consist of the following:

	2012			2011
Billed-federal government	$	664,533		$	2,961,279
Billed-commercial and other		73,892			70,100
Total billed		738,425			3,031,379
Unbilled		-			-
Allowance for doubtful accounts		(381	)		(141,721	)
Accounts receivable, net	$	738,044		$	2,889,658