ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023
Changes in foreign currency translation
Beginning accumulated foreign currency translation	$ 228	$ 224	$ 220	$ 222
Change in cumulative translation adjustment before reclassifications	12	15	20	17
Income taxes	0	0	0	0
Net current period other comprehensive income	12	15	20	17
Ending accumulated foreign currency translation	240	239	240	239
Changes in retirement plans
Beginning accumulated retirement plans benefit income	1,841	1,032	1,884	1,072
Amortization of net actuarial gain	(21)	(20)	(64)	(60)
Income taxes	0	0	0	0
Net current period other comprehensive loss	(21)	(20)	(64)	(60)
Ending accumulated retirement plans benefit income	1,820	1,012	1,820	1,012
Accumulated other comprehensive income, net of taxes	$ 2,060	$ 1,251	$ 2,060	$ 1,251	$ 2,104