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, 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
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
Net income (loss)	$ (152)
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
Exercise of options, net	$ 855		855
Exercise of options, net (in shares)		209,008
Issuance of restricted stock	2	$ 2
Issuance of restricted stock (in shares)		1,452,618
Issuance of common stock under employee stock purchase plan	2,174	$ 1	2,173
Issuance of common stock under employee stock purchase plan (in shares)		1,168,220
Repurchase of common stock	(14,081)	$ (3)	(14,078)
Repurchase of common stock (in shares)		(3,108,369)
Share-based compensation	9,385		9,385
Tax withholding upon vesting of restricted stock units (in shares)		(77,924)
Extinguishment of allocated cost related to convertible note exchange	(14,562)		(14,562)
Bifurcation of conversion option upon issuance of convertible notes	25,166		25,166
Net income (loss)	(6,311)				(6,311)
Cumulative translation adjustment	1,705			1,705
Change in defined benefit pension obligation	872			872
Balance at Jun. 30, 2021	$ 68,840	$ 91	554,680	2,093	(488,024)
Balance (in shares) at Jun. 30, 2021	90,821,661	90,821,661
Net income (loss)	$ (11,092)
Balance at Jun. 30, 2021	$ 68,840	$ 91	$ 554,680	$ 2,093	$ (488,024)
Balance (in shares) at Jun. 30, 2021	90,821,661	90,821,661