Segment Information (Schedule of Segment Perfomance Measures by Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 113,956	$ 110,707	$ 225,704	$ 212,024
Gross profit	20,708	20,644	42,213	39,163
Income (loss) before income taxes	7,098	7,164	14,720	11,903
Human Health [Member]
Segment Reporting Information [Line Items]
Net sales	29,851	27,308	56,260	50,061
Gross profit	8,907	8,471	17,010	15,062
Income (loss) before income taxes	4,252	4,295	7,371	6,846
Pharmaceutical Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales	39,785	38,648	80,393	80,957
Gross profit	5,471	5,697	12,047	12,469
Income (loss) before income taxes	1,085	1,069	3,638	3,949
Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	44,320	44,751	89,051	81,006
Gross profit	6,330	6,476	13,156	11,632
Income (loss) before income taxes	2,296	2,501	5,381	4,091
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ (535)	$ (701)	$ (1,670)	$ (2,983)

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

+ Details

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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- Details

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