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Other Long-term Liabilities (Details) (USD $)
 3 Months Ended 9 Months Ended 0 Months Ended
Mar. 31, 2013
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Jul. 30, 2008
Paint and Coatings
Sep. 30, 2013
Paint and Coatings
Dec. 31, 2012
Paint and Coatings
Other Liabilities [Line Items]              
Deferred revenue, noncurrent, related to certain staffing requirements       $ 275,000      
Payment to settle deferred revenue liability 52,000            
Gain (loss) on settlement of deferred revenue liability 223,000 223,000 0        
Long-term purchase commitment, amount         4,800,000    
Cash received from supplier as discount toward future purchases         300,000    
Liability related to deferred discount         $ 300,000 $ 206,000 $ 227,000