ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Foreign currency translation:
Balance at beginning of period	$ 925	$ 1,053
Net current period other comprehensive loss	(234)	(128)
Balance at end of the period	691	925
Retirement plans:
Balance at beginning of period	(1,439)	(2,111)
Amortization of net actuarial loss and prior service cost	55	124
Net actuarial (loss) gain arising during the period	(2,224)	548
Net current period other comprehensive (loss) income	(2,169)	672
Balance at end of the period	(3,608)	(1,439)
Accumulated other comprehensive loss, net of taxes	$ (2,917)	$ (514)