Stockholders' Equity - Additional Information (Detail) - USD ($)		1 Months Ended	2 Months Ended		12 Months Ended
	Jan. 15, 2014	Jan. 31, 2014	May. 31, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2013	Sep. 30, 2013	Jun. 30, 2013
Shareholders Equity [Line Items]
Common stock and warrants issued, shares	5,000,000	5,000,000
Common stock and warrants issued, Value		$ 15,000,000
Common stock issued for services			$ 489,501
Common Stock, shares issued					89,762,872	89,762,872
Common Stock, shares outstanding					89,762,872	89,762,872
Exercise of stock options (in shares)						525,000
Stock Issued During Period, Value, Stock Options Exercised						$ 435,500
Preferred Stock Shares Outstanding					0	0
Warrant
Shareholders Equity [Line Items]
Common stock and warrants issued, shares	2,500,000	2,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 4.74
Exercise of stock options (in shares)					0	0	0
Common Stock
Shareholders Equity [Line Items]
Exercise of stock options (in shares)						525,000
Stock Issued During Period, Value, Stock Options Exercised						$ 525
Common Stock | Former Director
Shareholders Equity [Line Items]
Exercise of stock options (in shares)						525,000
Stock Issued During Period, Value, Stock Options Exercised						$ 435,500
Private Placement memorandum
Shareholders Equity [Line Items]
Common stock issued for services			$ 2,000,198	$ 346,202
Common Stock, shares issued									3,220,966
Investors
Shareholders Equity [Line Items]
Common Stock, shares issued								8,052,416		11,664,665
Investors | Common Stock
Shareholders Equity [Line Items]
Common stock and warrants issued, shares						5,000,000
Placement Agent
Shareholders Equity [Line Items]
Common stock and warrant issued, shares		250,000
Common Stock, shares issued								805,242		1,496,499