Reverse Stock Split - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]
Reverse stock split, description	The Company's Board of Directors and stockholders approved a 1-for-2.5 reverse stock split of the Company's common stock effective on January 16, 2014, which resulted in an adjustment to the preferred stock conversion price to reflect a proportional decrease in the number of shares of common stock to be issued upon conversion
Reverse stock split, ratio	2.5
Reverse stock split, effective date	Jan. 16, 2014