Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Accumulated Deficit
Beginning balance (in shares) at Jun. 30, 2018		44,834			5,806
Beginning balance at Jun. 30, 2018	$ 310,932	$ 45	$ 678,549	$ (30,633)	$ (129,914)	$ (207,115)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for employee stock purchase plan and upon exercise of stock options (in shares)		17			(76)
Issuance of common stock for employee stock purchase plan and upon exercise of stock options	1,718		20		$ 1,698
Vesting of Restricted stock awards (in shares)		390
Stock compensation plan expense	12,361		12,361
Warrant settlements (in shares)		895
Warrant settlements	(4)	$ 1	(5)
Minimum pension liability adjustments, net of tax	(46)			(46)
Net loss	(918)					(918)
Unrealized loss on available for sale securities, net of tax	(2)			(2)
Change in fair value on interest rate hedging instruments	327			327
Foreign currency translation adjustment	(1,367)			(1,367)
Ending balance (in shares) at Sep. 30, 2018		46,136			5,730
Ending balance at Sep. 30, 2018	349,264	$ 46	690,925	(31,721)	$ (128,216)	(181,770)
Beginning balance (in shares) at Jun. 30, 2019		46,995			5,680
Beginning balance at Jun. 30, 2019	379,377	$ 47	721,438	(43,593)	$ (127,095)	(171,420)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for employee stock purchase plan and upon exercise of stock options (in shares)		13			(60)
Issuance of common stock for employee stock purchase plan and upon exercise of stock options	2,174		775		$ 1,399
Vesting of Restricted stock awards (in shares)		377
Repurchase of common stock to be held in treasury (in shares)					233
Repurchase of common stock to be held in treasury	(10,005)				$ (10,005)
Stock compensation plan expense	11,099		11,099
Minimum pension liability adjustments, net of tax	180			180
Net loss	(1,367)					(1,367)
Unrealized loss on available for sale securities, net of tax	(3)			(3)
Change in fair value on interest rate hedging instruments	(677)			(677)
Foreign currency translation adjustment	(5,879)			(5,879)
Ending balance (in shares) at Sep. 30, 2019		47,385			5,853
Ending balance at Sep. 30, 2019	$ 374,936	$ 47	$ 733,312	$ (49,972)	$ (135,701)	$ (172,750)