EARNINGS (LOSS) PER SHARE - Calculation of Earning Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Numerator for basic and diluted loss per share
Net loss	$ (10,657)	$ (6,320)	$ (4,194)	$ (2,171)	$ (16,977)	$ (6,365)
Preferred dividends	0		0		(334)	(334)
Net loss applicable to common shares	$ (10,657)		$ (4,194)		$ (17,311)	$ (6,699)
Denominator for basic loss per share - weighted average shares outstanding (in shares)	60,059,936		52,150,106		60,056,924	49,861,735
Effect of dilutive potential common shares (in shares)	0		0		0	0
Denominator for diluted loss per share (in shares)	60,059,936		52,150,106		60,056,924	49,861,735
Basic loss per share (in dollars per share)	$ (0.18)		$ (0.08)		$ (0.29)	$ (0.13)
Diluted loss per share (in dollars per share)	$ (0.18)		$ (0.08)		$ (0.29)	$ (0.13)