Basis of Presentation and Significant Accounting Policies (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	9 Months Ended	12 Months Ended	0 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012	Mar. 31, 2013 Credit Concentration Risk [Member]	Jun. 30, 2012 Credit Concentration Risk [Member]	Mar. 23, 2012 M5 Networks, Inc. [Member]	Mar. 31, 2012 M5 Networks, Inc. [Member]	Jun. 30, 2012 M5 Networks, Inc. [Member]
M5 Networks, Inc. Acquisition [Abstract]
Increase in indemnification asset								$ 6,600,000	$ 6,600,000	$ 6,600,000
Decrease in property, plant and equipment										(2,300,000)
Increase in goodwill								3,500,000		2,500,000
Increase in other assets										1,000,000
Decrease in accounts payable										(50,000)
Increase in accrued liabilities										300,000
Increase in accrued taxes and surcharges								6,600,000	6,600,000	6,600,000
Increase in other long-term liabilities										900,000
Reclassifications [Abstract]
Reclassification from accrued liabilities to accrued taxes and surcharges					$ 1,300,000
Computation of Net Loss per Share [Abstract]
Diluted securities not included in computation of diluted net loss per share as result would have been anti-dilutive (in shares)	11.2	9.8	11.2	9.8
Concentration Risk [Line Items]
Concentration risk, percentage (in hundredths)						26.00%	22.00%