Other Equity Transactions - Additional Information (Detail) (USD $)	1 Months Ended			1 Months Ended
	Apr. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	May 31, 2013 Two Employees Bonuse	May 31, 2013 Twenty Employees Bonuse	May 31, 2013 Royalty	Apr. 30, 2013 Underwriting Agreement
Other Equity Transactions [Line Items]
Issuance of common stock	8,400,000
Proceeds from issuance of common stock	$ 42,000,000						$ 6,300,000
Stock issued during period, shares, new issues				11,905	4,400	4,578
Common stock, shares, issued		20,564,163	10,883,280				1,260,000
Stock issued during period, value, new issues				$ 67,500	$ 23,848	$ 24,813