Quarterly report pursuant to sections 13 or 15(d)

Stock Based Compensation (Details)

v2.4.0.6
Stock Based Compensation (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options outstanding (in shares) 2,234,000 [1] 2,617,000 [2] 2,644,000 3,039,833
Outstanding and fully vested stock options (in shares) 1,846,500 [1] 2,067,000 [2]    
Weighted average exercise price (in dollars per share) $ 1.93 [1] $ 1.99 [2] $ 1.96 $ 1.98
Compensation expense $ 51,000 $ 64,000    
Total unrecognized compensation cost related to unvested options 236,000      
Unrecognized compensation cost to be recognized in 2013 101,000      
Unrecognized compensation cost to be recognized in 2014 96,000      
Unrecognized compensation cost to be recognized in 2015 39,000      
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      
Employee Stock Option [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options outstanding (in shares) 1,403,000      
Outstanding and fully vested stock options (in shares) 1,015,500      
Weighted average exercise price (in dollars per share) $ 2.01      
Remaining weighted contractual life 2 years 2 months 12 days      
Compensation expense 33,000 38,000    
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      
Director Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 10 years      
Vesting period 6 months      
Stock options outstanding (in shares) 831,000      
Outstanding and fully vested stock options (in shares) 831,000      
Weighted average exercise price (in dollars per share) $ 2.04      
Remaining weighted contractual life 4 years 8 months 12 days      
Compensation expense $ 18,000 $ 26,000    
[1] Options with exercise prices ranging from $1.10 to $2.95
[2] Options with exercise prices ranging from $1.41 to $2.95