INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Effective income tax rate	10.90%	(9.20%)	36.70%
Income before tax	$ 17,400	$ (20,000)	$ 9,600
Net deferred tax assets	19,100
Valuation allowance	8,759	8,811
Unrecognized tax benefits	11,360	11,106	10,939	$ 10,882
Unrecognized tax benefits that would favorably impact the effective tax rate	7,900	7,700	$ 5,600
Possible decrease in unrecognized tax benefits	100
Interest on income tax expense	100
Undistributed earnings of foreign subsidiaries	77,700
Federal research and development and AMT credit carryforward	961	817
Tax Years 2019 and 2020
Operating Loss Carryforwards [Line Items]
Tax benefit from GLITI high income exclusion	(2,600)
Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	1,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	(100)	$ 2,100
Federal tax loss carryforward not subject to expiration	3,500
Tax credit carryforward	$ 7,300
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Operating Loss Carryforwards [Line Items]
Effective income tax rate	34.00%	34.00%	34.00%
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net deferred tax assets	$ 23,400
Valuation allowance	8,800
Federal tax loss carryforward not subject to expiration	23,800
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Federal tax loss carryforward not subject to expiration	100
Operating loss carryforwards subject to expiration	2,000
Tax credit carryforward	400
Federal research and development and AMT credit carryforward	$ 300