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Stock-Based Compensation (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted exercisable for varying periods, number of years     10 years    
Common stock available for grant 4,723,683   4,723,683    
Authorized to issue common stock in relation to stock options or restricted shares outstanding or available for grant 12,138,888   12,138,888    
Stock options vested         3,457,300
Stock options vested, weighted average exercise price         $ 0.67
Total intrinsic value of options exercised     $ 36,000 $ 76,000  
Total amount of cash received from the exercise of stock options     63,000 35,000  
Total intrinsic value of stock options vested or expected to vest 461,148   461,148    
Remaining weighted average contractual term for options exercisable     4 years 5 months 23 days    
Non-cash compensation cost related to stock and stock options and restricted stock recognized 61,000 69,000 476,000 528,000  
Weighted average grant date fair value of common stock and restricted stock units granted     $ 0.96 $ 2.21  
Total grant date fair value     350,000 436,000  
Restricted Stock [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total intrinsic value of stock options vested or expected to vest 0   0    
Total fair value of restricted stock units vested $ 0 $ 499,000