Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
Summary of Significant Accounting Policies [Abstract]
Number of days in delivery period following sale of system	90 days
Fair Value By Asset Class [Line Items]
Cash and cash equivalents	$ 26,222	$ 28,074	$ 25,533	$ 27,927
Fair Value, Measurements, Recurring [Member]
Fair Value By Asset Class [Line Items]
Cash	16,185	18,037
Money market funds	10,037	10,037
Cash and cash equivalents	26,222	28,074
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair Value By Asset Class [Line Items]
Cash	16,185	18,037
Money market funds	10,037	10,037
Cash and cash equivalents	26,222	28,074
Fair Value, Measurements, Recurring [Member] | Observable (Level 2) [Member]
Fair Value By Asset Class [Line Items]
Cash	0	0
Money market funds	0	0
Cash and cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value By Asset Class [Line Items]
Cash	0	0
Money market funds	0	0
Cash and cash equivalents	$ 0	$ 0
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maintenance Period	1 year
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Maintenance Period	3 years