Concentrations of Risk - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Concentration Risk [Line Items]
Sales revenues	$ 4,693,248	$ 6,866,959
Revenues and Accounts Receivable
Concentration Risk [Line Items]
Percentage of purchases	71.00%
Customer A
Concentration Risk [Line Items]
Sales revenues	4,003,164
Accounts receivable	$ 3,743,254