EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income (loss)	$ 958	$ (2,695)	$ (3,330)	$ (5,662)	$ (1,737)	$ (8,992)
Denominator:
Weighted average basic shares (in shares)	11,570		11,509		11,560	11,503
Dilutive effect of restricted stock units (in shares)	62		0		0	0
Weighted average diluted shares	11,632		11,509		11,560	11,503
Income (loss) per share:
Basic (in dollars per share)	$ 0.08		$ (0.29)		$ (0.15)	$ (0.78)
Diluted (in dollars per share)	$ 0.08		$ (0.29)		$ (0.15)	$ (0.78)