Revenue Recognition - Summary of Revenue from the Sale of Products and Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Geographic Areas (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 34,136	$ 45,847
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	34,136	45,847
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	3,613	6,025
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	2,054	2,558
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	4,813	6,569
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	22,294	28,763
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,362	$ 1,932