SHARE-BASED COMPENSATION - Summary of Stock Option Activity (Details) - Employee Stock Purchase Plan ESPP - $ / shares	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance (in shares)	99,193	87,133	70,515
Options granted (in shares)	70,985	86,946	55,227
Options granted, Weighted Average Exercise Price (in dollars per share)	$ 3.26	$ 3.63	$ 5.45
Shares Available for Grant, Options Granted (in shares)	(70,985)	(86,946)	(55,227)
Options exercised (in shares)	(16,196)	(20,615)	(11,981)
Options exercised, Weighted Average Exercise Price (in dollars per share)	$ 4.65	$ 3.52	$ 5.72
Options canceled (in shares)	(36,022)	(54,271)	(26,628)
Gross options granted (in shares)	70,985	86,946	55,227
Ending balance (in shares)	117,960	99,193	87,133
Shares Available For Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance (in shares)	380,192	412,867	450,007
Options granted (in shares)	70,985	86,946	55,227
Shares Available for Grant, Options Granted (in shares)	(70,985)	(86,946)	(55,227)
Options canceled (in shares)	(36,022)	(54,271)	(18,087)
Gross options granted (in shares)	70,985	86,946	55,227
Ending balance (in shares)	345,229	380,192	412,867