SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Revenue by Solution (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 76,424	$ 51,146	$ 44,312
Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	100.00%	100.00%	100.00%
Mailbacks
Disaggregation of Revenue [Line Items]
Total revenues	$ 49,617	$ 26,578	$ 24,501
Mailbacks | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	64.90%	52.00%	55.20%
Route-based pickup services
Disaggregation of Revenue [Line Items]
Total revenues	$ 13,677	$ 10,390	$ 9,029
Route-based pickup services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	17.90%	20.30%	20.40%
Unused medications
Disaggregation of Revenue [Line Items]
Total revenues	$ 8,159	$ 9,163	$ 6,936
Unused medications | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	10.70%	17.90%	15.70%
Third party treatment services
Disaggregation of Revenue [Line Items]
Total revenues	$ 570	$ 247	$ 290
Third party treatment services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	0.70%	0.50%	0.70%
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,401	$ 4,768	$ 3,556
Other | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue Percentage	5.80%	9.30%	8.00%