Accounts Receivable - Summary of Accounts Receivable (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserve for doubtful accounts receivable	$ (4,631,593)	$ (5,131,593)
Accounts receivable, net	3,845,936	207,005
Trade [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	8,428,990	4,808,678
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 48,539	$ 529,920