Net Accounts Receivable of Continuing Operations (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Customer accounts billed	$ 3,400,647	$ 3,042,332
Customer accounts unbilled	1,016,524	887,653
Allowance for doubtful accounts	(1,027,128)	(429,686)
Accounts receivable, net	$ 3,390,043	$ 3,500,299