Intangible Assets - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 28, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 0	$ 180,000	$ 366,000	$ 542,000	$ 724,000
Intangible assets, net		31,973,000		31,973,000		$ 364,000
Icon Bioscience Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Initial purchase price				32,000,000
Durasert [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net		0		0
Tethadur [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net		0		0
DEXYCU [Member] | Icon Bioscience Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense		0
Initial purchase price	$ 32,000,000			32,000,000
Amortization expense remainder of fiscal year 2018		$ 0		$ 0