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Stockholders' Equity, Stock Option 2 (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]    
Stock-based compensation expense $ 622,000 $ 796,000
Stock Options [Member]
   
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Options exercised in period, total intrinsic value 6,000 2,400,000
Fair value of options vested 207,000 471,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]    
Unrecognized compensation cost related to stock options 1,500,000  
Nonvested awards, unrecognized cost, period for recognition 2 years 4 months 24 days  
Stock-based compensation expense 336,000 657,000
Exercise period for vested portion of stock option grants 90 days  
Stock Options [Member] | President and Chief Executive Officer [Member]
   
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]    
Stock-based compensation expense 193,000  
Reversal of previously recorded stock based compensation expense $ (505,000)