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Shareholders' Equity (Details) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Employee Stock Options [Member]
Sep. 30, 2013
Employee Stock Options [Member]
Sep. 30, 2014
Employee Stock Options [Member]
Sep. 30, 2013
Employee Stock Options [Member]
Sep. 30, 2014
Director Stock Options [Member]
Sep. 30, 2013
Director Stock Options [Member]
Sep. 30, 2014
Director Stock Options [Member]
Sep. 30, 2013
Director Stock Options [Member]
Sep. 30, 2013
2001 Stock Compensation Plan [Member]
Sep. 30, 2014
Common Stock [Member]
Sep. 30, 2014
Additional Paid-In Capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares issued of common stock (in shares)             0   60,000   30,000    
Changes in common stock [Roll Forward]                          
Balance $ 109,479,000 $ 109,057,000                   $ 277,000 $ 123,510,000
Balance (in shares)                       27,735,878  
Exercise of employee stock options                       2,000 (64,000)
Exercise of employee stock options (in shares)                       157,950  
Exercise of outside director options                       0 8,000
Exercise of outside director options (in shares)                       12,112  
Expense of employee options vesting                       0 192,000
Expense of outside director options vesting                       0 75,000
Balance 109,479,000 109,057,000                   279,000 123,721,000
Balance (in shares)                       27,905,940  
Options [Roll Forward]                          
Outstanding beginning balance (in shares)         2,500,949       146,000        
Granted (in shares)         0       60,000        
Forfeited (in shares)         (3,333)       0        
Expired (in shares)         0       0        
Exercised (in shares)         (400,203)       (27,334)        
Outstanding ending balance (in shares)     2,097,413   2,097,413   178,666   178,666        
Exercisable (in shares)     1,905,747   1,905,747   82,333   82,333        
Weighted Average Exercise Price [Roll Forward]                          
Beginning Balance (in dollars per share)         $ 3.60       $ 2.93        
Granted (in dollars per share)         $ 0       $ 3.77        
Forfeited (in dollars per share)         $ 2.32       $ 0        
Expired (in dollars per share)         $ 0       $ 0        
Exercised (in dollars per share)         $ 2.46       $ 2.53        
Ending Balance (in dollars per share)     $ 3.82   $ 3.82   $ 3.28   $ 3.28        
Exercisable (in dollars per share)     $ 3.99   $ 3.99   $ 3.30   $ 3.30        
Weighted Average Remaining Contractual Life - Years         3 years 10 months 13 days       8 years 1 month 20 days        
Aggregate intrinsic value of options outstanding     679,000   679,000   58,000   58,000        
Vesting period                 3 years        
Expiration period                 10 years        
Risk free interest rate (in hundredths)                 2.06%        
Expected lives                 6 years        
Expected volatility (in hundredths)                 65.4469%        
Share-based compensation expense     106,000 44,000 192,000 76,000 15,000 16,000 75,000 47,000 48,000    
Total unrecognized expense for the option plan     200,000   200,000   168,000   168,000        
Weighted average remaining vesting period     1 year 6 months 11 days       2 years 7 months 6 days            
Intrinsic value of option exercised     $ 19,000   $ 743,000   $ 17,000   $ 45,000