Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2012 Y	Dec. 31, 2011	Jun. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 194,000	$ 819,000	$ 386,000	$ 1,652,000
Intangible assets, net	3,883,000		3,883,000		4,226,000
Amortization expense per year	780,000		780,000
Estimated remaining useful life	5.0		5.0
Milestone payment from Alimera			25,000,000
Impairment of finite-lived intangible assets		14,830,000		14,830,000
Maximum
Finite-Lived Intangible Assets [Line Items]
Market capitalization		82,000,000		82,000,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Market capitalization		23,100,000		23,100,000
Durasert
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	2,700,000		2,700,000
BioSilicon
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 1,200,000		$ 1,200,000