v2.4.0.8
M. Share-Based Compensation (Details-Option Activity) (Employee Stock Option [Member], USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Stock Option [Member]
     
Number of Shares      
Outstanding, beginning balance 419,000 377,000 288,000
Granted 1,099,000 88,000 124,000
Exercised (29,000) (1,000) (3,000)
Forfeited (16,000) (19,000) (25,000)
Expired (5,000) (26,000) (7,000)
Outstanding, ending balance 1,468,000 419,000 377,000
Exericsable, ending balance 275,000    
Vested and expected to vest 1,325,000    
Weighted Average Exercise Price      
Outstanding, beginning balance $ 5.936 $ 5.877 $ 5.838
Granted $ 9.214 $ 6.000 $ 6.000
Exercised $ 5.875 $ 6.291 $ 6.000
Forfeited $ 7.099 $ 6.000 $ 6.000
Expired $ 5.986 $ 5.301 $ 5.973
Outstanding, ending balance $ 8.379 $ 5.936 $ 5.877
Exericsable, ending balance $ 5.915    
Vested and expected to vest $ 8.287