SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Revenue recorded from bill and hold inventory	$ 3,900	$ 3,500	$ 2,700
Bill and hold inventory	3,700	2,800
Disaggregation of Revenue [Line Items]
Contract liability	7,028	3,262
Mailbacks and unused medications
Disaggregation of Revenue [Line Items]
Contract liability		2,800	$ 2,700
Route-based pickup services
Disaggregation of Revenue [Line Items]
Capitalized contract cost, incremental costs to obtain contracts	200	100
Capitalized contract cost, amortization	$ 200	$ 100