SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Decrease to accumulated deficit	$ 761	$ (1,505)
Increase to stockholders' equity	29,578	26,126		$ 25,174	$ 25,287
Revenue recorded from bill and hold inventory	3,500	2,700
Bill and hold inventory	2,800	2,800
Contract asset	156	260
Contract liability	3,262	2,502
Contract liability, net of current portion	705	503
Capitalized contract cost, incremental costs to obtain contracts	100	100
Capitalized contract cost, amortization (less than)	100	100
Retained Earnings
Property, Plant and Equipment [Line Items]
Increase to stockholders' equity	$ 761	$ (1,505)		$ (2,057)	$ (1,385)
Adjustments | Accounting Standards Update 2014-09
Property, Plant and Equipment [Line Items]
Decrease to accumulated deficit			$ 300
Increase to stockholders' equity			300
Increase to contract asset			$ 300