Balance Sheet Accounts (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Balance Sheet Accounts [Line Items]
Inventories	$ 56,601,000		$ 56,601,000		$ 58,014,000
Amortization	8,100,000	$ 9,000,000	17,000,000	$ 18,000,000
Letters for credit outstanding	1,000,000		$ 1,000,000
Standard hardware warranty period			12 months
Standard software warranty period			90 days
Limited lifetime hardware warranty maximum period after end of sale of product			5 years
Revolving Facility
Balance Sheet Accounts [Line Items]
Term of agreement					5 years
Borrowing capacity					$ 50,000,000
Remaining borrowing capacity	32,200,000		$ 32,200,000
Term Loan
Balance Sheet Accounts [Line Items]
Term of agreement					5 years
Borrowing capacity					$ 65,000,000
Cost Of Product Revenue
Balance Sheet Accounts [Line Items]
Amortization	$ 3,800,000	$ 4,500,000	$ 8,300,000	$ 9,100,000
Maximum
Balance Sheet Accounts [Line Items]
Extended warranty period			5 years
Minimum
Balance Sheet Accounts [Line Items]
Extended warranty period			1 year
Minimum | Net Revenue | Customer Concentration Risk
Balance Sheet Accounts [Line Items]
Concentration risk			10.00%
Cash equivalents | Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments			3 months
Short-term investments | Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments			1 year
Short-term investments | Minimum
Balance Sheet Accounts [Line Items]
Maturity period for investments			3 months
Marketable securities | Minimum
Balance Sheet Accounts [Line Items]
Maturity period for investments			1 year