Goodwill and Other Intangible Assets - Summary of changes in goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Goodwill [Roll Forward]
Beginning balance	$ 67,870	$ 66,516
Measurement period adjustments		1,578
Changes in foreign currency exchange rates	1	(224)
Ending balance	67,871	67,870
Human Health Segment
Goodwill [Roll Forward]
Beginning balance	66,039	64,461
Measurement period adjustments		1,578
Changes in foreign currency exchange rates
Ending balance	66,039	66,039
Pharmaceutical Ingredients Segment
Goodwill [Roll Forward]
Beginning balance	1,650	1,832
Measurement period adjustments
Changes in foreign currency exchange rates	1	(182)
Ending balance	1,651	1,650
Performance Chemicals Segment
Goodwill [Roll Forward]
Beginning balance	181	223
Measurement period adjustments
Changes in foreign currency exchange rates		(42)
Ending balance	$ 181	$ 181