Income Tax - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Tax provision (benefit)	$ 197,000	$ (364,000)	$ 197,000	$ (2,478,000)
Effective tax rate related to statutory tax	12.00%		12.00%
Deferred tax benefit or expense	0	0	0	0
Federal and state NOLs	116,000,000		116,000,000
Potential fair value of tax savings on federal and state NOLs	45,000,000		45,000,000
Year of expiration of net operating loss carryforward expiration year			2028
Accruals for tax uncertainties	$ 0	$ 0	$ 0	$ 0