Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 190,000	$ 193,000	$ 382,000	$ 389,000
Intangible assets, net	1,512,000		1,512,000		$ 1,925,000
Amortization expense per year	$ 756,000		$ 756,000
Remaining estimated useful life	2 years		2 years
Durasert [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 1,100,000		$ 1,100,000
BioSilicon [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 453,000		$ 453,000