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
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Intangible assets      
Net amount $ 816   $ 853
Product formulations
      
Intangible assets      
Gross carrying amount 1,763   1,763
Accumulated amortization 947   910
Net amount 816   853
Amortization expense for intangible assets 37 37  
Estimated Amortization Expense      
2015 149    
2016 91    
2017 91    
2018 91    
2019 $ 91    
Product formulations | Minimum
      
Intangible assets      
Estimated useful lives 9 years    
Product formulations | Maximum
      
Intangible assets      
Estimated useful lives 15 years