Patent Sale (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2013
Patent Sale Narrative Details
Sale of patents	$ 1.0	$ 12.0	$ 13.0
Future maximum patent license collection	$ 3.0		$ 3.0