SEGMENT AND GEOGRAPHIC INFORMATION - GEOGRAPHIC AREAS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Geographic information
Long-lived assets	$ 9,598	$ 19,296
Total (excluding interest income)	12,013	9,206
United States
Geographic information
Long-lived assets	3,366	4,119
Total (excluding interest income)	5,515	5,418
Canada
Geographic information
Long-lived assets	6,232	15,177
Total (excluding interest income)	$ 6,498	$ 3,788