Stock Compensation - Additional Information (Detail) (USD $)	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Stock Option [Member]	Sep. 30, 2012 Stock Option [Member]	Sep. 30, 2013 Stock Option [Member]	Sep. 30, 2012 Stock Option [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock [Member] Scenario, Forecast [Member]	Sep. 30, 2013 1999 Long-Term Incentive Plan [Member]	Sep. 30, 2013 2007 Long-Term Incentive Plan [Member]	Dec. 31, 2012 2007 Long-Term Incentive Plan [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Authorized shares of stock, option plan, maximum												3,569,766	2,000,000
Shares Granted													12,317	10,898
Maximum term for option exercisable													10 years
Option expiry term (Years)												10 years
Recognition of stock option expense		$ 5,500	$ 4,816	$ 14,970	$ 13,042	$ 68,000	$ 103,000	$ 260,000	$ 604,000
Unrecognized cost of nonvested stock options granted		5,344		5,344		68,000		68,000
Expected additional expense for 2014		16,690		16,690		184,000		184,000
Expected additional expense for 2015		$ 9,192		$ 9,192		$ 76,000		$ 76,000
Weighted average remaining life for outstanding stock	4 years 5 months 1 day
Exercise price range, lower range limit	$ 1.20
Exercise price range, upper range limit	$ 12.38
Non Vested shares issued during 2013						106,070		106,070		129,321
Vested shares during 2013								26,317			32,685
Vested shares during 2014						42,665		42,665
Vested shares during 2015						29,883		29,883
Vested shares during 2016						837		837