Quarterly Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 39,564		$ 34,945		$ 32,337		$ 29,766		$ 28,821		$ 26,474		$ 25,309		$ 23,293		$ 136,612		$ 103,897		$ 82,490
Gross profit	30,449		27,196		25,024		22,902		21,892		20,233		19,351		18,039		105,571		79,515		63,274
Net loss	$ (9,628)		$ (9,712)		$ (8,658)		$ (7,292)		$ (6,841)		$ (6,219)		$ (5,767)		$ (5,210)		$ (35,290)		$ (24,037)		$ (16,790)
Net loss per common share - basic and diluted (in usd per share)	$ (0.31)	[1]	$ (0.32)	[1]	$ (0.32)	[1]	$ (0.29)	[1]	$ (0.28)	[1]	$ (0.29)	[1]	$ (0.28)	[1]	$ (0.26)	[1]	$ (1.25)	[1]	$ (1.11)	[1]	$ (0.93)

[1] The summation of quarterly per share data may not equate to the calculation for the full fiscal year as quarterly calculations are performed on a discrete basis.