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