Quarterly report pursuant to sections 13 or 15(d)

Stock Based Compensation (Details)

v2.3.0.11
Stock Based Compensation (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options outstanding (in shares) 2,364,500 [1] 2,466,833 [2] 2,364,500 [1] 2,466,833 [2] 2,789,833 2,755,525
Outstanding and fully vested stock options (in shares) 2,064,500 [1] 2,155,000 [2] 2,064,500 [1] 2,155,000 [2]    
Weighted average exercise price (in dollars per share) $ 2.06 [1] $ 2.12 [2] $ 2.06 [1] $ 2.12 [2] $ 2.03 $ 2.09
Options granted (in shares)     0 0    
Exercise price of options granted (in dollars per share)     $ 0 $ 0    
Allocated Share-based Compensation Expense $ 34,000 $ 76,000 $ 98,000 $ 192,000    
Total unrecognized compensation cost related to unvested options 337,000   337,000      
Unrecognized compensation cost to be recognized in 2012 68,000   68,000      
Unrecognized compensation cost to be recognized in 2013 135,000   135,000      
Unrecognized compensation cost to be recognized in 2014 96,000   96,000      
Unrecognized compensation cost to be recognized in 2015 38,000   38,000      
Employee Stock Option [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Outstanding and fully vested stock options (in shares) 1,268,500   1,268,500      
Weighted average exercise price (in dollars per share) $ 2.13   $ 2.13      
Remaining weighted contractual life     1 year 9 months 15 days      
Allocated Share-based Compensation Expense 34,000 76,000 72,000 152,000    
Employee Stock Option [Member] | Contractual term with one-fifth yearly vesting [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Contractual term     10 years      
Proportional vesting number of shares (in hundredths)     20.00%      
Vesting period     5 years      
Employee Stock Option [Member] | Contractual term with one-third yearly vesting [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Contractual term     6 years      
Proportional vesting number of shares (in hundredths)     33.33%      
Vesting period     3 years      
Director Stock Options [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Contractual term     10 years      
Vesting period     6 months      
Outstanding and fully vested stock options (in shares) 796,000   796,000      
Weighted average exercise price (in dollars per share) $ 2.13   $ 2.13      
Remaining weighted contractual life     4 years 10 months 21 days      
Allocated Share-based Compensation Expense $ 0 $ 0 $ 26,000 $ 40,000    
1993 Non Qualified Stock Option Plan, 2004 and 2010 Stock Option Plans, and Non-Qualified Stock Option Agreement [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options outstanding (in shares) 1,818,500   1,818,500      
Non-Qualified Stock Option Agreement [Member]
            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Contractual term     10 years      
Proportional vesting number of shares (in hundredths)     25.00%      
Vesting period     4 years      
Options granted (in shares)     250,000      
Exercise price of options granted (in dollars per share)     $ 1.35      
[1] Options with exercise prices ranging from $1.41 to $2.95
[2] Options with exercise prices ranging from $1.42 to $2.98