Segment Information (Details 1) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Sep. 30, 2009
Sep. 30, 2006
Financial information about segment operations              
Revenues   $ 57,623 $ 41,812 $ 136,026 $ 93,026    
Corporate expenses   (3,575) (2,720) (10,368) (10,322)    
Environmental Remediation Charges (6,000)   (6,000)   (6,000) (13,700) (26,000)
Operating Income (Loss)   10,983 (4,862) 18,537 (10,338)    
Depreciation and amortization   3,546 3,369 10,323 10,235    
Total Operating Segments [Member]
              
Financial information about segment operations              
Operating Income (Loss)   14,558 3,858 28,905 5,984    
Fine Chemicals [Member]
              
Financial information about segment operations              
Revenues   36,359 30,838 78,428 60,792    
Operating Income (Loss)   5,204 (452) 3,039 (4,923)    
Depreciation and amortization   2,929 3,114 8,897 9,391    
Specialty Chemicals [Member]
              
Financial information about segment operations              
Revenues   21,001 10,931 54,182 30,800    
Operating Income (Loss)   9,694 4,849 26,635 11,948    
Depreciation and amortization   520 146 1,132 495    
Other Businesses [Member]
              
Financial information about segment operations              
Revenues   263 43 3,416 1,434    
Operating Income (Loss)   (340) (539) (769) (1,041)    
Depreciation and amortization   4 4 13 13    
Corporate [Member]
              
Financial information about segment operations              
Depreciation and amortization   $ 93 $ 105 $ 281 $ 336