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Related Party Transactions (Details) (USD $)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Marco Realty [Member]
     
Related Party Transaction [Line Items]      
Rent paid to a related party $ 0 $ 0 $ 166
Marco International [Member]
     
Related Party Transaction [Line Items]      
Purchases from related party 18,136 24,731 21,962
Due to related party 962 2,952  
Rare metal purchases from related party 1,013 1,001 0
Other purchases from related party 0 1,001  
Sales of products to related party 851 895 590
Other sales of products to related party 137 192  
Net sales under agreement 5,611 524 0
Due from related party 1,115 0  
Norchem [Member]
     
Related Party Transaction [Line Items]      
Sales of products to related party 5,923 5,575 4,065
Due from related party 622 576  
Equity interest in affiliate (in hundredths) 50.00%    
Yonvey Minority Stockholder [Member]
     
Related Party Transaction [Line Items]      
Due from related party $ 1,112 $ 1,086