Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Jun. 30, 2020			48,147			5,975
Beginning balance at Jun. 30, 2020	$ 392,334	$ 56	$ 48	$ 764,906	$ (48,675)	$ (143,333)	$ (180,612)	$ 56
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for employee stock purchase plan and upon exercise of stock options (in shares)						(75)
Issuance of common stock for employee stock purchase plan and upon exercise of stock options	2,168			379		$ 1,789
Vesting of restricted stock awards (in shares)			543
Vesting of restricted stock awards	1		$ 1
Issuance of common stock in connection with acquisition (in shares)			166
Issuance of common stock in connection with acquisition	8,183			8,183
Repurchase of common stock to be held in treasury (in shares)						238
Repurchase of common stock to be held in treasury	(10,755)					$ (10,755)
Stock compensation plan expense	22,162			22,162
Minimum pension liability adjustments, net of tax	(564)				(564)
Net loss	(4,224)						(4,224)
Unrealized loss on available for sale securities, net of tax	(35)				(35)
Change in fair value on interest rate hedging instruments	912				912
Foreign currency translation adjustment	22,749				22,749
Ending balance (in shares) at Dec. 31, 2020			48,856			6,138
Ending balance at Dec. 31, 2020	432,987		$ 49	795,630	(25,613)	$ (152,299)	(184,780)
Beginning balance (in shares) at Sep. 30, 2020			48,560			5,900
Beginning balance at Sep. 30, 2020	422,416		$ 49	783,457	(39,381)	$ (141,544)	(180,165)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock awards (in shares)			296
Repurchase of common stock to be held in treasury (in shares)						238
Repurchase of common stock to be held in treasury	(10,755)					$ (10,755)
Stock compensation plan expense	12,173			12,173
Minimum pension liability adjustments, net of tax	(331)				(331)
Net loss	(4,615)						(4,615)
Unrealized loss on available for sale securities, net of tax	(10)				(10)
Change in fair value on interest rate hedging instruments	466				466
Foreign currency translation adjustment	13,643				13,643
Ending balance (in shares) at Dec. 31, 2020			48,856			6,138
Ending balance at Dec. 31, 2020	432,987		$ 49	795,630	(25,613)	$ (152,299)	(184,780)
Beginning balance (in shares) at Jun. 30, 2021			49,294			6,057
Beginning balance at Jun. 30, 2021	456,234		$ 49	819,392	(16,081)	$ (150,282)	(196,844)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for employee stock purchase plan and upon exercise of stock options (in shares)						(78)
Issuance of common stock for employee stock purchase plan and upon exercise of stock options	2,313			278		$ 2,035
Vesting of restricted stock awards (in shares)			515
Vesting of restricted stock awards	1		$ 1
Repurchase of common stock to be held in treasury (in shares)						1,163
Repurchase of common stock to be held in treasury	(50,000)					$ (50,000)
Stock compensation plan expense	27,525			27,525
Minimum pension liability adjustments, net of tax	(212)				(212)
Net loss	(21,541)						(21,541)
Unrealized loss on available for sale securities, net of tax	1				1
Change in fair value on interest rate hedging instruments	1,323				1,323
Foreign currency translation adjustment	(4,516)				(4,516)
Ending balance (in shares) at Dec. 31, 2021			49,809			7,142
Ending balance at Dec. 31, 2021	411,128		$ 50	847,195	(19,485)	$ (198,247)	(218,385)
Beginning balance (in shares) at Sep. 30, 2021			49,586			6,496
Beginning balance at Sep. 30, 2021	440,739		$ 49	833,563	(21,376)	$ (169,746)	(201,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock awards (in shares)			223
Vesting of restricted stock awards	1		$ 1
Repurchase of common stock to be held in treasury (in shares)						646
Repurchase of common stock to be held in treasury	(28,501)					$ (28,501)
Stock compensation plan expense	13,632			13,632
Minimum pension liability adjustments, net of tax	(70)				(70)
Net loss	(16,634)						(16,634)
Unrealized loss on available for sale securities, net of tax	0
Change in fair value on interest rate hedging instruments	907				907
Foreign currency translation adjustment	1,054				1,054
Ending balance (in shares) at Dec. 31, 2021			49,809			7,142
Ending balance at Dec. 31, 2021	$ 411,128		$ 50	$ 847,195	$ (19,485)	$ (198,247)	$ (218,385)