Income Taxes - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Limited net operating loss	$ 29,100,000
Federal net operating loss carryforwards	35,500,000
Operating loss used to offset against taxable income annually prior to the January 2009 ownership change	361,000
Operating loss used to offset against taxable income between the earlier change and the August 2011 ownership change	274,000
Percentage of net operating loss subject to expiration or unavailable for offset against taxable income	59.60%
Uncertain tax positions	$ 0
Tax year under examination	Tax years 2009 and thereafter federally, earlier for certain states
Open tax year	2009