COMMITMENTS AND CONTINGENCIES, Purchase Commitments (Details) - SiC Materials [Member] $ in Thousands	6 Months Ended
	Dec. 31, 2021 USD ($) Option	Dec. 31, 2020 USD ($)
Purchase Commitments [Abstract]
Percentage of materials committed to be purchased	100.00%
Number of options to extend term of exclusive supply agreement | Option	1
Extension period of exclusive supply agreement	2 years
Total purchase commitment	$ 52,950
Remaining purchase commitment	29,850
Purchases	3,000	$ 1,030
Minimum [Member]
Purchase Commitments [Abstract]
Future minimum annual purchase commitments	4,000
Maximum [Member]
Purchase Commitments [Abstract]
Future minimum annual purchase commitments	$ 10,000