SHAREHOLDERS' EQUITY (Details 4) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Numerator for basic and diluted earnings per share attributable to common stockholders:
Net income (loss) attributable to common stockholders	$ 13,600	$ 31,289	$ (2,388)
Denominator:
Basic (in shares)	13,993,638	14,017,279	14,133,352
Effect of diluted securities (in shares)	25,205,000	0	0
Denominator for diluted earnings per share-adjusted weighted average shares and assumed conversions (in shares)	14,018,843	14,017,279	14,133,352
Basic earnings (loss) per share (in dollars per share)	$ 0.98	$ 2.23	$ (0.17)
Diluted earnings (loss) per share (in dollars per share)	$ 0.98	$ 2.23	$ (0.17)