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Commitments And Contingencies (Details) (USD $)
 3 Months Ended
Jun. 30, 2012
Jun. 30, 2010
Dec. 31, 2012
Jul. 19, 2012
Jun. 30, 2007
Commitments and Contingencies (Textual) [Abstract]          
Amount anticipated to spent for further Source Control work     $ 50,000    
Company made payments to Lower Willamette Group as interim settlement         175,000
Amount spent to complete work specified in Work Plans     2,500,000    
Total stand by letters of credit     3,200,000    
Class Action settlement amount       12,500,000  
Insurance retainer payment 200,000 200,000      
Plaintiffs' attorney's fees included in Accrued Liabilities       $ 750,000