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Intangible Assets - Schedule of Net Book Value of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2017
Net book value of intangible assets	$ 30,129	$ 31,358	$ 364
DEXYCU [Member]
Net book value of intangible assets	$ 30,129	31,358	0
Finite lived intangible assets remaining amortization period	12 years 3 months
Durasert [Member]
Net book value of intangible assets	$ 0	0	265
Finite lived intangible assets remaining amortization period	0 years
Tethadur [Member]
Net book value of intangible assets	$ 0	$ 0	$ 99
Finite lived intangible assets remaining amortization period	0 years

X

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

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X

- Definition

Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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