FINANCING ARRANGEMENTS - Sale and Leaseback Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018
Sale Leaseback Transaction [Line Items]
Term of contract	15 years	10 years
Lease period as a percent of economic life (more than)	75.00%
Short-term financial liability	$ 900
Long-term lease liability	28,910		$ 0
Salt Lake City
Sale Leaseback Transaction [Line Items]
Short-term financial liability	$ 1,120
Interest Rate	3.30%
Long-term lease liability	$ 17,354		0
Chattanooga
Sale Leaseback Transaction [Line Items]
Short-term financial liability	$ 805
Interest Rate	3.70%
Long-term lease liability	$ 11,556		$ 0