Summary of Significant Accounting Policies - Segment Information - Net Sales by Medical Indication (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)
Medical Indication Information
Net sales	$ 155,054	$ 154,961
Segment information
Number of reportable segments | segment	1
Antibiotic
Medical Indication Information
Net sales	$ 4,089	3,349
Anti-Psychosis
Medical Indication Information
Net sales	10,889	14,991
Cardiovascular
Medical Indication Information
Net sales	21,770	11,306
Central Nervous System
Medical Indication Information
Net sales	7,197	8,818
Gallstone
Medical Indication Information
Net sales	2,214	6,564
Gastrointestinal
Medical Indication Information
Net sales	15,040	14,553
Glaucoma
Medical Indication Information
Net sales	548	2,668
Migraine
Medical Indication Information
Net sales	9,737	15,015
Muscle Relaxant
Medical Indication Information
Net sales	3,179	3,791
Pain Management
Medical Indication Information
Net sales	4,947	5,761
Respiratory
Medical Indication Information
Net sales	1,015	1,647
Thyroid Deficiency
Medical Indication Information
Net sales	53,878	47,214
Urinary
Medical Indication Information
Net sales	1,552	2,997
Other
Medical Indication Information
Net sales	14,338	12,696
Contract manufacturing revenue
Medical Indication Information
Net sales	$ 4,661	$ 3,591