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 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Intangible assets          
Net amount $ 1,077   $ 1,077   $ 1,151
Product formulations
          
Intangible assets          
Gross carrying amount 1,763   1,763   1,763
Accumulated amortization 686   686   612
Net amount 1,077   1,077   1,151
Amortization expense for intangible assets 37 37 74 74  
Estimated amortization expense          
Fiscal year, one 149   149    
Fiscal year, two 149   149    
Fiscal year, three 149   149    
Fiscal year, four 149   149    
Fiscal year, five $ 149   $ 149    
Minimum | Product formulations
          
Intangible assets          
Estimated useful lives     9 years    
Maximum | Product formulations
          
Intangible assets          
Estimated useful lives     15 years