Balance Sheet Accounts (Narratives) (Details) (USD $)	9 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Oct. 31, 2013	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014
Balance Sheet Accounts [Line Items]
Other than temporary impairment loss		$ 148,000
Borrowings under Revolving Facility	24,000,000	59,000,000
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
Maximum investment in one obligor or maker (percent)	10.00%
Revolving Facility
Balance Sheet Accounts [Line Items]
Term of agreement			5 years
Borrowing capacity			60,000,000
Borrowings under Revolving Facility						24,000,000
Repayments under Revolving Facility				19,000,000	30,000,000
Remaining borrowing capacity	8,600,000			8,600,000
Term Loan
Balance Sheet Accounts [Line Items]
Term of agreement			5 years
Borrowing capacity			$ 65,000,000
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%
Maximum
Balance Sheet Accounts [Line Items]
Extended warranty period	5 years
Cash equivalents | Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments	3 months
Short-term investments | Minimum
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
Marketable securities | Minimum
Balance Sheet Accounts [Line Items]
Maturity period for investments	1 year