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Long Term Debt - Long Term Debt Payments Due August (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Debt Disclosure [Abstract]    
June 1, 2013 $ 750 $ 750
June 1, 2014 750 750
June 1, 2015 1,000 1,000
Unamortized discount (221) (264)
Total 2,279 2,236
Current portion 741 727
Long-term debt $ 1,538 $ 1,509