SEGMENT INFORMATION - Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
SEGMENT INFORMATION
Revenues	$ 89,605	$ 60,469
United States
SEGMENT INFORMATION
Revenues	85,272	56,253
Other North America
SEGMENT INFORMATION
Revenues	143	148
Pacific Rim
SEGMENT INFORMATION
Revenues	2,040	2,826
Europe
SEGMENT INFORMATION
Revenues	1,795	1,207
Other
SEGMENT INFORMATION
Revenues	$ 355	$ 35