ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015
Changes in foreign currency translation
Beginning accumulated foreign currency translation	$ 935	$ 513	$ 819	$ 1,692
Change in cumulative translation adjustment before reclassifications	(3)	121	113	(1,204)
Amounts reclassified from accumulated other comprehensive income	0	11	0	157
Income taxes	0	0	0	0
Net current period other comprehensive income (loss)	(3)	132	113	(1,047)
Ending accumulated foreign currency translation	932	645	932	645
Changes in retirement plans
Beginning accumulated retirement plans benefit cost	(2,864)	(1,897)	(2,941)	(1,950)
Amortization of net actuarial loss and prior service cost	50	26	127	79
Income taxes	0	0	0	0
Net current period other comprehensive income	50	26	127	79
Ending accumulated retirement plans benefit cost	(2,814)	(1,871)	(2,814)	(1,871)
Accumulated other comprehensive loss, net of taxes	$ (1,882)	$ (1,226)	$ (1,882)	$ (1,226)	$ (2,122)