Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 194,000	$ 194,000	$ 386,000	$ 386,000
Intangible assets, net	3,127,000		3,127,000		3,430,000
Amortization expense per year	782,000		782,000
Remaining estimated useful life			4 years
Durasert [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	2,100,000		2,100,000
BioSilicon [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 1,000,000		$ 1,000,000