Stock Compensation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Options granted in 2009 exercisable period	3 years
Shares, Granted	2,192
Weighted average period to cost recognized	2 years
Weighted average remaining life for outstanding stock	4 years 9 months 4 days
Exercise price range, lower range limit	$ 1.20
Exercise price range, upper range limit	$ 5.89
Stock Option [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Stock-based compensation expense	$ 6,200	$ 6,400
Expected additional expense for 2015	15,000
Expected additional expense for 2016	5,000
Restricted Stock [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Stock-based compensation expense	190,000	179,000
Expected additional expense for 2016	456,000
Non Vested shares issued during 2015	314,951		223,624
Vested shares during 2015	80,441
Vested shares during 2016	88,851
Vested shares during 2017	84,284
Vested shares during 2018	61,375
Unrecognized cost of nonvested stock options granted	458,000
Expected additional expense for 2017	255,000
Expected additional expense for 2018	83,000
2007 Long-Term Incentive Plan [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Authorized shares of stock, option plan, maximum	2,000,000
Shares, Granted	2,192	1,794
Maximum term for option exercisable	10 years
1999 Long-Term Incentive Plan [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Authorized shares of stock, option plan, maximum	3,569,766
Option expiry term (Years)	10 years
Executive Incentive Plan
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Percentage of amount paid in cash	80.00%
Percentage of amount paid in restricted stock	20.00%
Restricted stock vesting period	3 years
Executive Incentive Plan | Restricted Stock Portion [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Stock-based compensation expense	68,000	107,000
Executive Incentive Plan | Cash Portion [Member]
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Stock-based compensation expense	168,000	100,000
Long Term Incentive Plan
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Stock-based compensation expense	$ 48,000	$ 50,000