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Shareholders' Equity (Details 5) (USD $)
 0 Months Ended 1 Months Ended 11 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 03, 2013
May 25, 2011
Feb. 22, 2011
Aug. 15, 2013
Jan. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Jul. 18, 2013
Minimum
Jul. 18, 2013
Maximum
Dec. 31, 2013
Stock Purchase Plan
Dec. 31, 2012
Stock Purchase Plan
Stock option disclosures                      
Maximum percent of base compensation contributed towards purchase of shares                   10.00%  
Percent of market value for employee purchases                   85.00%  
Employees purchased shares                   56,000 76,000
Shares are reserved for future employee purchases                   179,000  
Stock-based compensation expense           $ 533,000 $ 342,000     $ 34,000 $ 33,000
Stock Repurchase Plans                      
Repurchase of common stock, authorized 5,000,000 20,000,000 15,000,000           12,000,000    
Offered price per share under tender offer (in dollars per share)               $ 2.15 $ 2.35    
Repurchase of common stock, shares       929,051 3,877,000            
Price per share (in dollars per share)       $ 2.35              
Repurchase of common stock, net       $ 2,200,000 $ 17,562,000 $ 2,328,000 $ 213,000