Stockholders' Equity - Additional information (Detail) (USD $)	12 Months Ended			1 Months Ended	6 Months Ended	12 Months Ended			0 Months Ended		1 Months Ended			1 Months Ended	12 Months Ended				0 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 Minimum [Member]	Nov. 30, 2013 Maximum [Member]	Dec. 31, 2012 Maximum [Member]	Jan. 31, 2014 Subsequent Event [Member]	Feb. 07, 2014 Subsequent Event [Member]	Dec. 31, 2013 Mid Cap [Member]	Jul. 31, 2011 Equity Incentive Plan [Member]	Dec. 31, 2012 Equity Incentive Plan [Member] Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 LTIP [Member]	Dec. 31, 2013 LTIP [Member] Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 LTIP [Member] Restricted Stock Units (RSUs) [Member]	Mar. 11, 2011 Common Stock [Member]	Nov. 30, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2013 Series A Preferred Stock [Member]	Dec. 03, 2012 Series A Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock issued in the offering																			4,807,693		6,791,887
Company's securities for shelf registration									$ 75,000,000											$ 75,000,000
Common Stock, shares issued	38,204,384	37,497,703									658,489	7,500,000
Proceeds from issuance of common stock		38,373,014	13,996,773								4,000,000
Series A Preferred shares	$ 0.001	$ 0.001
Authorized shares of Preferred stock	5,000,000	5,000,000																				2,290,700
Series A Preferred shares issued																						2,709,300	2,709,300
Liquidation, dissolution or winding up, holders of the Series A Preferred per share payment																							$ 0.001
Restricted stock units ("RSUs") issued to directors and key employees															57,500		1,078,000	978,000
Restricted Stock Unit issuance cost							300,000										900,000	30,000
Company Issued, RSUs				118,853		1,078,336
Fair market value of shares granted	4,500,000
Options vesting Remaining period	3 years
Shares issued, RSUs					3,125	63,853
Fair value of RSU					10,000
Fair value of RSU				600,000
Company Issued						55,000
Restricted stock units reserve for future Officers																100,000
RSU's Vested as per Performance criteria during period																	8 years
Number of RSUs Vested	342,538																8,968
Covers a shares of Common Stock														4,200,000
Common Stock option outstanding and exercisable														3,192,596
Option awarded term														10 years
Weighted average grant date fair value of options granted	$ 3.28	$ 1.97	$ 3.43
Number of options granted in period with exercise price below market price	0	0	0
Unrecognized compensation cost related to unvested share-based compensation awards granted	4,600,000
Unrecognized compensation cost related to unvested share-based compensation awards granted year	6 years
Purchase of shares	357,356												357,356
Common Stock at a price	4.20												4.20
Warrants fair value													1,000,000
Warrants exercised to purchase shares of common stock	10,000	281,865	601,120
Price per shares of common stock	$ 5.00							$ 3.00		$ 5.00
Warrants classified as derivative liability		$ 236,865
Price per shares of common stock	$ 0.001	$ 0.001	$ 2.91									$ 0.001