Stockholders' Equity - Additional information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended			1 Months Ended	6 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Series A Preferred Stock [Member]	Aug. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Mid Cap [Member]	Sep. 30, 2013 Directors and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company Issued, RSUs				118,853		1,078,336		177,110
Fair value of shares granted								$ 0.5
Term of options granted period	10 years
Vesting period of shares	3 years
Weighted average grant date fair value of options granted	$ 2.97
Number of options granted in period with exercise price below market price	0
Unrecognized compensation cost related to unvested share-based compensation awards granted	7.4
Unrecognized compensation cost related to unvested share-based compensation awards granted year	2019
Purchase of shares	357,356						357,356
Common Stock at a price	4.20						4.20
Warrants fair value							1
Fair market value of shares granted	4.5
Options vesting Remaining period	3 years
Shares issued ,RSUs					3,125	63,853
fair value of RSU					0.01
fair value of RSU				$ 0.6
Company Issued						55,000
Preferred Stock, shares authorized	5,000,000	5,000,000
Series A Preferred shares	$ 0.001	$ 0.001
Shares of Series A Preferred were outstanding			2,709,300