LOSS PER SHARE CALCULATION - Calculation of Earning Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Numerator for basic and diluted loss per share
Net loss	$ (11,414)	$ (9,295)	$ (8,378)	$ (11,508)	$ (9,850)	$ (4,306)	$ (10,438)	$ (5,288)	$ (40,595)	$ (29,882)	$ (11,284)
Preferred dividends	0	(334)	0	(334)	0	(334)	0	(334)	(668)	(668)	(668)
Net loss available to common shareholders	$ (11,414)	$ (9,629)	$ (8,378)	$ (11,842)	$ (9,850)	$ (4,640)	$ (10,438)	$ (5,622)	$ (41,263)	$ (30,550)	$ (11,952)
Denominator for basic loss per share - weighted average shares outstanding (in shares)	64,154,252	64,096,778	63,664,256	60,096,852	60,065,978	60,065,053	60,059,936	60,053,912	62,980,193	60,061,243	51,840,518
Effect of dilutive potential common shares (in shares)									0	0	0
Denominator for diluted loss per share (in shares)	64,154,252	64,096,778	63,664,256	60,096,852	60,065,978	60,065,053	60,059,936	60,053,912	62,980,193	60,061,243	51,840,518
Basic loss per share (in USD per share)	$ (0.18)	$ (0.15)	$ (0.13)	$ (0.20)	$ (0.16)	$ (0.08)	$ (0.17)	$ (0.09)	$ (0.66)	$ (0.51)	$ (0.23)
Diluted loss per share (in USD per share)	$ (0.18)	$ (0.15)	$ (0.13)	$ (0.20)	$ (0.16)	$ (0.08)	$ (0.17)	$ (0.09)	$ (0.66)	$ (0.51)	$ (0.23)