Loss Per Share - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013
Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities outstanding		(3,999,000)	(3,311,000)
Restricted Stock Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities outstanding		(881,000)	(571,000)
Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities outstanding		(27,676,000)	(26,808,000)
Series D Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Accretion of the fair value allocated to a non-cash beneficial conversion feature	$ 2,150,000
Antidilutive securities outstanding		(6,125,000)	(6,125,000)
Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities outstanding		(250,000)	(250,000)