Weighted-Average Assumptions (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Fair Value Disclosures [Abstract]
Expected dividend yield	0.00%	[1]	0.00%	[1]

[1] The expected dividend yield is zero as the Company has not paid any dividends to date and does not expect to pay dividends prior to the expiration of the warrants.