Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

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Long-Term Debt (Details) (USD $)
In Thousands, unless otherwise specified
 0 Months Ended 3 Months Ended 12 Months Ended
Aug. 09, 2011
Mar. 31, 2014
Dec. 31, 2013
Aug. 08, 2013
Long-term debt        
Less current installments   $ (1,420) $ (2,267)  
Long-term debt less current installments   10,000 10,000  
Revolving credit agreement
        
Long-term debt        
Maximum borrowing capacity 15,000     25,000
Variable rate basis LIBOR LIBOR LIBOR  
Margin on variable rate (as a percent) 1.25% 1.50% 1.50%  
Annual commitment fee (as a percent) 0.25% 0.25%    
Long-term debt less current installments   10,000 10,000  
Term loan
        
Long-term debt        
Variable rate basis LIBOR LIBOR LIBOR  
Margin on variable rate (as a percent) 1.25% 1.50% 1.50%  
Face amount 10,000 10,000 10,000  
Monthly installments, including interest   284 284  
Total long-term debt   1,420 2,267  
Less current installments   $ (1,420) $ (2,267)