Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total Stockholders' Equity	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at Jun. 30, 2013	$ 106,835	$ 75	$ 424,524	$ 1,882	$ (319,646)
Balance (in shares) at Jun. 30, 2013		74,587,231
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net	5,312	$ 1	5,311
Exercise of stock options, net (in shares)		1,061,513
Issuance of restricted stock	1	$ 1
Issuance of restricted stock (in shares)		913,070
Issuance of common stock under employee stock purchase plan	3,536		3,536
Issuance of common stock under employee stock purchase plan (in shares)		650,315
Share-based compensation	11,038		11,038
Embedded conversion feature on Convertible Note (Note 11)	7,844		7,844			$ 7,844
Unamortized Convertible Senior Note issuance costs reclassified to equity	(243)		(243)
Tax withholding upon vesting of restricted stock units	(260)		(260)
Tax withholding upon vesting of restricted stock units (in shares)		(33,764)
Net loss	(35,448)				(35,448)	(35,448)
Cumulative translation adjustment	25			25		25
Unrealized gain (loss) on investments, net of tax	475			475		475
Change in defined benefit pension obligation	(567)			(567)		(567)
Balance at Jun. 30, 2014	98,548	$ 77	451,750	1,815	(355,094)
Balance (in shares) at Jun. 30, 2014		77,178,365
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net	2,563		2,563
Exercise of stock options, net (in shares)		529,331
Issuance of restricted stock		$ 1	(1)
Issuance of restricted stock (in shares)		1,174,531
Issuance of common stock under employee stock purchase plan	4,033	$ 1	4,032
Issuance of common stock under employee stock purchase plan (in shares)		719,279
Share-based compensation	13,746		13,746
Tax withholding upon vesting of restricted stock units	(660)		(660)
Tax withholding upon vesting of restricted stock units (in shares)		(123,668)
Net loss	(40,209)				(40,209)	(40,209)
Cumulative translation adjustment	(1,196)			(1,196)		(1,196)
Unrealized gain (loss) on investments, net of tax	(95)			(95)		(95)
Change in defined benefit pension obligation	(950)			(950)		(950)
Balance at Jun. 30, 2015	75,780	$ 79	471,430	(426)	(395,303)	$ 75,780
Balance (in shares) at Jun. 30, 2015		79,477,838				79,477,838
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net	285		285
Exercise of stock options, net (in shares)		58,279
Issuance of restricted stock		$ 2	(2)
Issuance of restricted stock (in shares)		1,570,577
Issuance of common stock under employee stock purchase plan	3,588		3,588
Issuance of common stock under employee stock purchase plan (in shares)		729,259
Share-based compensation	12,396		12,396
Unamortized Convertible Senior Note issuance costs reclassified to equity	(3,519)		(3,519)
Tax withholding upon vesting of restricted stock units	(2,832)		(2,832)
Tax withholding upon vesting of restricted stock units (in shares)		(457,745)
Net loss	(25,504)				(25,504)	$ (25,504)
Cumulative translation adjustment	(48)			(48)		(48)
Unrealized gain (loss) on investments, net of tax	63			63		63
Change in defined benefit pension obligation	(549)			(549)		(549)
Balance at Jun. 30, 2016	$ 59,660	$ 81	$ 481,346	$ (960)	$ (420,807)	$ 59,660
Balance (in shares) at Jun. 30, 2016		81,378,208				81,378,208