Related Party Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended								12 Months Ended	0 Months Ended
	Aug. 26, 2013	Aug. 05, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 2011 Purchase And Sale Agreement [Member]	Oct. 31, 2011 Purchase And Sale Agreement [Member] Agreement One [Member]	Oct. 31, 2011 Purchase And Sale Agreement [Member] Agreement Two [Member]	Oct. 31, 2011 Purchase And Sale Agreement [Member] Restricted Stock [Member]	Oct. 31, 2011 Chief Executive Officer [Member]	Dec. 31, 2013 Chief Executive Officer [Member] Convertible Debt Securities [Member]	Oct. 31, 2011 Stock Purchase Agreement [Member]
Related Party Transaction [Line Items]
Subscription agreement effective date as of April 16, 2005											Jan. 01, 2008
Employment agreement effective date as of April 16, 2006											Jan. 01, 2008
Percent of common stock represent by related party											10.00%
Percent of equity interest by related party											10.00%
Preferred stock converted to common stock upon the consummation of the reverse split										830,925
Cash payments for share transfer						$ 4.25
Sale of common stock to third party under condition A			11,352,812	9,909,212			112,530	135,036	90,024
Par value of common stock to third party under condition A			$ 0.001	$ 0.001			$ 22.2162	$ 27.7717	$ 33.3244
Common stock repurchased by the company, per share value												$ 5.11
Cash payments to third party	3.00	3.75	2.50
Cash payment from related party	3.00	3.75	2.50
Fee and other consulting service expenses			$ 127,000	$ 125,000	$ 156,000