Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Jun. 30, 2017	$ 46,533	$ 84	$ 496,887	$ (52)	$ (450,386)
Balance (in shares) at Jun. 30, 2017		83,739,804
Exercise of options, net	437		437
Exercise of options, net (in shares)		108,800
Issuance of restricted stock		$ 1	(1)
Issuance of restricted stock (in shares)		1,166,776
Issuance of common stock under employee stock purchase plan	3,334	$ 1	3,333
Issuance of common stock under employee stock purchase plan (in shares)		921,583
Share-based compensation	12,289		12,289
Tax withholding upon vesting of restricted stock units	(293)		(293)
Tax withholding upon vesting of restricted stock units (in shares)		(61,536)
Retirement of Convertible Senior Notes	288		288
Retirement of Convertible Senior Notes (in shares)		253,829
Allocated transaction cost in debt issuance	8,798		8,798
Net income (loss)	(23,899)				(23,899)
Cumulative translation adjustment	83			83
Reclassification adjustments on available for sale investments, net of tax	89			89
Change in defined benefit pension obligation	973			973
Balance at Jun. 30, 2018	48,632	$ 86	521,738	1,093	(474,285)
Balance (in shares) at Jun. 30, 2018		86,129,256
Exercise of options, net	489		489
Exercise of options, net (in shares)		114,932
Issuance of restricted stock		$ 2	(2)
Issuance of restricted stock (in shares)		1,491,379
Issuance of common stock under employee stock purchase plan	3,022	$ 1	3,021
Issuance of common stock under employee stock purchase plan (in shares)		911,741
Share-based compensation	10,086		10,086
Tax withholding upon vesting of restricted stock units (in shares)		(125,797)
Adoption of new revenue recognition standard	5,175				5,175
Net income (loss)	(16,430)				(16,430)
Cumulative translation adjustment	(247)			(247)
Change in defined benefit pension obligation	(856)			(856)
Balance at Jun. 30, 2019	$ 49,871	$ 89	535,332	(10)	(485,540)
Balance (in shares) at Jun. 30, 2019	88,521,511	88,521,511
Issuance of restricted stock	$ (206)	$ 1	(207)
Issuance of restricted stock (in shares)		1,579,037
Issuance of common stock under employee stock purchase plan	2,451	$ 1	2,450
Issuance of common stock under employee stock purchase plan (in shares)		1,136,096
Share-based compensation	8,166		8,166
Tax withholding upon vesting of restricted stock units (in shares)		(58,536)
Net income (loss)	3,827				3,827
Cumulative translation adjustment	(238)			(238)
Change in defined benefit pension obligation	(236)			(236)
Balance at Jun. 30, 2020	$ 63,635	$ 91	$ 545,741	$ (484)	$ (481,713)
Balance (in shares) at Jun. 30, 2020	91,178,108	91,178,108