Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

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Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Intangible assets          
Net amount $ 891   $ 891   $ 1,002
Product formulations
          
Intangible assets          
Gross carrying amount 1,763   1,763   1,763
Accumulated amortization 872   872   761
Net amount 891   891   1,002
Amortization expense for intangible assets 37 37 111 111  
Estimated amortization expense          
2013 149   149    
2014 149   149    
2015 149   149    
2016 91   91    
2017 $ 91   $ 91    
Product formulations | Minimum
          
Intangible assets          
Estimated useful lives     9 years    
Product formulations | Maximum
          
Intangible assets          
Estimated useful lives     15 years