Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended		2 Months Ended		3 Months Ended		1 Months Ended
	Jan. 31, 2014	Aug. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Jun. 30, 2012	May 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Apr. 30, 2012	Sep. 30, 2013	Nov. 30, 2013	Jun. 30, 2013
Shareholders Equity [Line Items]
Common stock and warrant issued, shares	5,000,000
Common stock repurchased, shares	2,500,000
Common stock and warrants issued, Value	$ 15,000,000
Common stock issued for services			0	0	18,500
Common Stock, shares issued			89,762,872	84,237,872	62,219,050	89,762,872		489,501		62,219,050
Common Stock, shares outstanding			89,762,872	84,237,872	62,219,050	89,762,872				62,219,050
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 4.74
Proceeds from issuance of common stock and warrant from LPC			13,812,373	5,330,946	1,600,198
Common stock issued , shares		50,000
Common stock and warrant issued, shares	250,000	18,500
Exercise of stock options (in shares)			525,000
Stock Issued During Period, Value, Stock Options Exercised			435,500
Director [Member]
Shareholders Equity [Line Items]
Exercise of stock options (in shares)						525,000
Stock Issued During Period, Value, Stock Options Exercised						435,500
Warrant
Shareholders Equity [Line Items]
Exercise of stock options (in shares)			0	0	0
Private Placement memorandum
Shareholders Equity [Line Items]
Common stock issued for services								2,000,198	346,202	708,600	795,001
Common Stock, shares issued														3,220,966
Common stock issued , shares							150,000
Common stock and warrant issued, shares							18,500
Equity Unit Purchase Agreements | LPC
Shareholders Equity [Line Items]
Common stock and warrants issued, shares												166,667
Proceeds from issuance of common stock and warrant from LPC												50,000
Committed shares issued												2,084
Equity Unit Purchase Agreements | LPC | Scenario 1
Shareholders Equity [Line Items]
Common stock and warrants issued, shares													89,286
Proceeds from issuance of common stock and warrant from LPC													25,000
Committed shares issued													1,042
Equity Unit Purchase Agreements | LPC | Scenario 2
Shareholders Equity [Line Items]
Common stock and warrants issued, shares													96,154
Proceeds from issuance of common stock and warrant from LPC													25,000
Committed shares issued													1,042
Equity Unit Purchase Agreements | LPC | Scenario 3
Shareholders Equity [Line Items]
Common stock and warrants issued, shares													185,185
Proceeds from issuance of common stock and warrant from LPC													$ 50,000
Committed shares issued													2,084
Investors
Shareholders Equity [Line Items]
Common Stock, shares issued					3,300,337					3,300,337					8,052,416	11,664,665
Placement Agent
Shareholders Equity [Line Items]
Common Stock, shares issued															805,242	1,496,499