Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Benefit attributable to reduction in allowance against certain deferred tax assets	$ 0	$ (15,217,000)	$ (5,614,000)
Deferred tax benefit		346,000
Net deferred tax asset	22,436,737	23,788,520
Net current deferred tax asset in prepaid and other assets	3,798,000	2,472,000
Net non-current deferred tax asset	18,639,000	21,317,000
Aggregate Federal NOL carryforwards	61,165,000
Federal NOLs subject to an annual limitation	20,317,000
Federal NOLs not subject to an annual limitation	40,848,000
New NOLs annual limitation as a result of merger	2,779,000
Aggregate Federal NOLs expiring	252,000
Federal NOL attributable to excess tax deductions	1,723,000
Expirations of NOL	2018
Valuation allowance	0	0	15,217,000
Unrecognized tax benefits and the related estimate for interest and penalties	105,000	62,000	345,000	145,000
Interest and penalties related to tax provisions	$ 43,000	$ 51,000	$ 200,000