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Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2013
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
     December 31,  
     2013      2012  
     (in thousands)  

Series A Term Note, maturing on February 25, 2014, due in annual payments of $2.1 million that began February 25, 2008, plus interest at 10.50% paid quarterly, on February 25, May 25, August 25 and November 25, collateralized by accounts receivable, inventory and certain equipment

    $ 2,143       $ 4,286   

Series B Term Note, maturing on June 21, 2014, due in annual payments of $1.5 million that began June 21, 2008, plus interest at 10.22% paid quarterly, on March 21, June 21, September 21 and December 21, collateralized by accounts receivable, inventory and certain equipment

      1,500         3,000   

Series C Term Note, maturing on October 26, 2014, due in annual payments of $1.4 million that began October 26, 2008, plus interest at 9.11% paid quarterly, on January 26, April 26, July 26 and October 26, collateralized by accounts receivable, inventory and certain equipment

      1,429         2,857   

Series D Term Note, maturing on January 24, 2015, due in annual payments of $643,000 that began January 24, 2009, plus interest at 9.07% paid quarterly, on January 24, April 24, July 24 and October 24, collateralized by accounts receivable, inventory and certain equipment

      1,285         1,928   
  

 

 

     

 

 

  

Total long-term debt

    $ 6,357       $ 12,071   
  

 

 

     

 

 

  

Amounts are presented in the Consolidated Balance Sheets as follows:

      

Current portion of long-term debt

    $ 5,714       $ 5,714   

Long-term debt, less current portion

      643         6,357   
  

 

 

     

 

 

  
   $ 6,357       $ 12,071   
  

 

 

     

 

 

  
Future Principal Payments of Long-Term Debt

Future principal payments of long-term debt are as follows (in thousands):

 

2014

    $ 5,714   

2015

      643   

2016

      —     

2017

      —     

2018

      —     

Thereafter

      —     
  

 

 

  
   $ 6,357