Deferred Tax Adjustment - Second Quarter 2012 Restatement - Additional Information (Detail) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012		Mar. 31, 2012	Jun. 30, 2013	Jun. 30, 2012
Adjusted Earnings Before Interest Taxes Depreciation And Amortization And Other Non Cash Items [Abstract]
Period of deferred tax liability adjustment amortization				12 years
Deferred tax liability		$ 0.0				$ 0.0
Net loss	(6,194,000)	(9,114,000)	[1]		(12,044,000)	(13,076,000)	[1]
Deferred tax benefit		$ 0				$ (2,500,000)	[1]

[1] Restated