ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Foreign currency translation:
Balance at beginning of period	$ 1,053	$ 906
Income taxes	0	0
Net current period other comprehensive (loss) income	(128)	147
Balance at end of the period	925	1,053
Retirement plans:
Balance at beginning of period	(2,111)	(4,826)
Amortization of net actuarial loss and prior service cost		326
Net actuarial gain arising during the period	548	2,389
Income taxes	0	0
Net current period other comprehensive income	672	2,715
Balance at end of the period	(1,439)	(2,111)
Accumulated other comprehensive loss, net of taxes	$ (514)	$ (1,058)