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Stock Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Options granted in 2009 exercisable period     3 years    
Shares, Granted     4,359    
Weighted average period to cost recognized     2 years    
Weighted average remaining life for outstanding stock     4 years 6 months 15 days    
Exercise price range, lower range limit     $ 1.20    
Exercise price range, upper range limit     $ 5.89    
Stock Option [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense $ 6,200 $ 6,000 $ 13,000 $ 13,000  
Expected additional expense for 2015 10,000   10,000    
Expected additional expense for 2016 7,000   7,000    
Restricted Stock [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense 176,000 58,000 366,000 $ 236,000  
Expected additional expense for 2016 $ 503,000   $ 503,000    
Non Vested shares issued during 2015 264,228   264,228   223,624
Vested shares during 2015     32,230    
Vested shares during 2016     96,254    
Vested shares during 2017     84,821    
Vested shares during 2018     50,923    
Unrecognized cost of nonvested stock options granted $ 333,000   $ 333,000    
Expected additional expense for 2017 253,000   253,000    
Expected additional expense for 2018 $ 93,000   $ 93,000    
2015 Long Term Incentive Compensation Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Authorized shares of stock, option plan, maximum 1,200,000   1,200,000    
2007 Long-Term Incentive Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Authorized shares of stock, option plan, maximum 2,000,000   2,000,000    
Shares, Granted     4,359 3,623  
Maximum term for option exercisable     10 years    
1999 Long-Term Incentive Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Authorized shares of stock, option plan, maximum 3,569,766   3,569,766    
Option expiry term (Years)     10 years    
Executive Incentive Plan          
Share Based Compensation Arrangement By Share Based Payment Award [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]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense $ 62,000 51,000 $ 131,000 $ 157,000  
Executive Incentive Plan | Cash Portion [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense 319,000 160,000 487,000 260,000  
Long Term Incentive Plan          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense $ 23,000 $ 6,000 $ 71,000 $ 44,000