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MARKETABLE EQUITY SECURITIES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Marketable Securities
Fair value changes in equity securities	$ 222	$ (3,631)	$ (1,153)	$ (5,099)
Investment value	$ 15,200		$ 15,200		$ 16,000
Contango
Marketable Securities
Investment shares owned (in shares)	809,744		809,744
Rubicon
Marketable Securities
Investment shares owned (in shares)	3,949,575		3,949,575
TriStar
Marketable Securities
Common stock that can be purchased by warrants (in shares)	15,712,000		15,712,000