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Capital lease obligations (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
2013 $ 87  
2014 87  
2015 85  
2016 13  
Total 274  
Less amounts representing interest (18)  
Future payments on capital leases 256  
Less current portion 77 97
Long term portion $ 179 $ 251