INCOME TAXES - Schedule of Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (5,090)	$ (2,174)	$ (11,823)	$ (3,914)
Income tax benefit	(1,760)	(1,345)	(2,831)	(2,786)
Net loss	$ (3,330)	$ (829)	$ (8,992)	$ (1,128)
Effective tax rate	35.00%	62.00%	24.00%	71.00%