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, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 45,847	$ 53,306
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	45,847	53,306
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	6,025	2,143
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	2,558	13,044
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	6,569	4,652
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	28,763	31,296
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,932	$ 2,171