Stockholders' Equity - Additional information (Detail) (USD $)	1 Months Ended				9 Months Ended		12 Months Ended	0 Months Ended	9 Months Ended					1 Months Ended	9 Months Ended							1 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2014	Feb. 28, 2014 Executives	Jan. 31, 2014	Nov. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Feb. 07, 2014 Definitive Securities Purchase Agreement [Member]	Sep. 30, 2014 Definitive Securities Purchase Agreement [Member]	Sep. 30, 2014 Employees And Directors Stock Options [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 Midcap warrant [Member]	Nov. 30, 2013 Common Stock [Member]	Sep. 30, 2014 Common Stock [Member]	Sep. 30, 2014 Series A Preferred Stock [Member]	Sep. 30, 2014 Board Members [Member] Members	Sep. 30, 2014 Board Members [Member] Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 New Board Member [Member] Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 As Reported [Member] Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 As Reported [Member] Restricted Stock Units (RSUs) [Member]	Oct. 31, 2014 Subsequent Event [Member]	Oct. 31, 2014 Subsequent Event [Member] Midcap warrant [Member]	Sep. 30, 2014 Directors and Employees [Member]	Sep. 30, 2014 LTIP [Member]	Sep. 30, 2014 LTIP [Member] Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 LTIP [Member] Restricted Stock Units (RSUs) [Member]	Jul. 17, 2014 2011 Equity Incentive Plan [Member]	Jul. 17, 2014 2011 Equity Incentive Plan [Member] Minimum [Member]	Jul. 17, 2014 2011 Equity Incentive Plan [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company Issued, RSUs											995,619							110,000	15,000					152,265
Fair market value of shares granted																								$ 1,000,000
Term of options granted period					10 years
RSU's Vested as per Performance criteria during period					3 years																					8 years
Weighted average grant date fair value of options granted					$ 6.77
Number of options granted in period with exercise price below market price					0
Unrecognized compensation cost related to non-vested share-based compensation awards granted	11,300,000				11,300,000
Unrecognized compensation cost related to non-vested share-based compensation awards granted year					2017
Increase the number of shares of common stock authorized																												2,000,000
Common stock authorized beginning balance	75,000,000				75,000,000		75,000,000																						6,800,000	8,800,000
Common stock underlying warrants	50,569,027				50,569,027		38,188,893						1,100,000										600,000
Proceeds from issuance of warrants													4,900,000										1,900,000
Common stock underlying warrants exercised cashless													357,356
Net issuance of shares													218,367
Company's securities for shelf registration														75,000,000
Common Stock, shares issued	50,584,518		658,489		50,584,518		38,204,384	7,500,000														116,911
Proceeds from common stock	8,600,000		3,900,000		12,500,000			58,200,000	58,200,000													1,900,000
Universal shelf registration amount, maximum				15,000,000
Common Stock, par value	$ 0.001				$ 0.001		$ 0.001	$ 0.001
Selling price of shares	$ 4.41				$ 4.41			$ 8.00
Offering price per share								3.10%
Company employees, directors and affiliates stock option exercised					1,337,878					1,300,000					1,331,063	0
Proceeds from common stock					4,572,919	347,434	400,000			4,600,000
Series A Preferred shares	$ 0.001				$ 0.001		$ 0.001
Preferred Stock, shares authorized	5,000,000				5,000,000		5,000,000
Series A Preferred stock converted																570,300
Shares of Series A Preferred were outstanding																2,139,000
Securities excluded from computation of diluted earnings per share					6,000,000	9,200,000
Number of executive officers from whom swing profits were recovered		3
Short swing profits recovered		80,000
Fair market value of shares granted					8,800,000						700,000	700,000						1,500,000	200,000
Options vesting remaining period					3 years												1 year
Number of new board members																	2
Number of RSUs Vested					224,932						55,000	55,000								359,446	359,446					4,447
Fair market value of previously granted RSUs vested											$ 3,200,000
Restricted stock units ("RSUs") issued to directors and key employees																										1,078,000	978,000
Restricted stock units reserve for future officers																									100,000