INCOME TAXES - Summary of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Deferred tax assets:
Net operating loss carryforwards	$ 47,984	$ 46,851
Asset reserves	6,666	7,231
Deferred research and development	1,503	1,420
Stock-based compensation	3,416	2,620
Other	(143)	2,135
Deferred tax assets, gross	59,426	60,257
Deferred tax liabilities:
Intangibles	(4,316)	(4,956)
Deferred tax assets, net	55,110	55,301
Valuation allowance	(55,296)	(55,480)
Deferred tax liabilities	$ (186)	$ (179)