ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Shareholders' equity	$ 151,393	$ 98,215	$ 114,423	$ 142,688
Accounts receivable
Beginning balance	7,676
Provision for expected losses	686
Write-offs	(991)
Ending balance	6,614	7,676
Finance receivable
Beginning balance	150	606
Provision for expected losses	550	142
Write-offs	0	(598)
Ending balance	1,109	150
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Shareholders' equity	$ (311,382)	(303,025)	$ (262,430)	(232,748)
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment terms	30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment terms	60 days
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable and financing receivable, allowance for credit loss, current		300
Shareholders' equity		348		200
Accounts receivable
Beginning balance	$ (757)
Ending balance		(757)
Finance receivable
Beginning balance	$ 409
Ending balance		409
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Shareholders' equity		$ 348		$ 200