REVENUE FROM CONTRACTS WITH CUSTOMERS - NARRATIVE (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Contract with customer, liability, current	$ 377	$ 1,087
Contract with customer, liability, revenue recognized	1,015	394
Revenue, remaining performance obligation (backlog)	$ 3,587
Percentage anticipated to be recognized in next 12 months	100.00%
Capitalized contract cost net, preconstruction	$ 504	689
Capitalized contract cost, amortization of preconstruction	326	296
Capitalized contract cost, impairment loss	0	0
Uninstalled materials, current	$ 348	$ 351
Minimum
Disaggregation of Revenue [Line Items]
Contract receivable retainage percentage	5.00%
Maximum
Disaggregation of Revenue [Line Items]
Contract receivable retainage percentage	10.00%