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Shareholders' Equity (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares issued of common stock (in shares) 15,000  
Changes in common stock [Roll Forward]    
Balance $ 116,117,000  
Balance 110,235,000  
Employee Stock Options [Member]
    
Options [Roll Forward]    
Outstanding beginning balance (in shares) 2,259,282  
Granted (in shares) 0  
Forfeited (in shares) 0  
Expired (in shares) 0  
Exercised (in shares) 0  
Outstanding ending balance (in shares) 2,259,282  
Exercisable (in shares) 2,119,282  
Weighted Average Exercise Price [Roll Forward]    
Beginning Balance (in dollars per share) $ 3.80  
Granted (in dollars per share) $ 0  
Forfeited (in dollars per share) $ 0  
Expired (in dollars per share) $ 0  
Exercised (in dollars per share) $ 0  
Ending Balance (in dollars per share) $ 3.80  
Exercisable (in dollars per share) $ 3.90  
Weighted Average Remaining Contractual Life - Years 4 years 18 days  
Aggregate intrinsic value of options outstanding 0  
Share-based compensation expense 16,000 2,000
Total unrecognized expense for the option plan 149,000  
Director Stock Options [Member]
    
Options [Roll Forward]    
Outstanding beginning balance (in shares) 150,000  
Granted (in shares) 0  
Forfeited (in shares) 0  
Expired (in shares) 0  
Exercised (in shares) 0  
Outstanding ending balance (in shares) 150,000  
Exercisable (in shares) 83,335  
Weighted Average Exercise Price [Roll Forward]    
Beginning Balance (in dollars per share) $ 3.05  
Granted (in dollars per share) $ 0  
Forfeited (in dollars per share) $ 0  
Expired (in dollars per share) $ 0  
Exercised (in dollars per share) $ 0  
Ending Balance (in dollars per share) $ 3.05  
Exercisable (in dollars per share) $ 2.97  
Weighted Average Remaining Contractual Life - Years 6 years 2 months 19 days  
Aggregate intrinsic value of options outstanding 0  
Share-based compensation expense 16,000 22,000
Total unrecognized expense for the option plan 96,000  
Common Stock [Member]
    
Changes in common stock [Roll Forward]    
Balance 277,000  
Balance (in shares) 27,652,602  
2001 stock compensation plan 0  
2001 stock compensation plan (in shares) 15,000  
Expense of employee options vesting 0  
Expense of outside director options vesting 0  
Balance 277,000  
Balance (in shares) 27,667,602  
Additional Paid-In Capital [Member]
    
Changes in common stock [Roll Forward]    
Balance 123,078,000  
2001 stock compensation plan 23,000  
Expense of employee options vesting 16,000  
Expense of outside director options vesting 16,000  
Balance $ 123,133,000