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	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 12,153	$ 13,270	$ 34,457	$ 40,454
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	12,153	13,270	34,457	40,454
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	1,094	1,207	4,162	3,466
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	1,202	699	1,832	1,409
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	1,023	1,496	3,108	5,832
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	7,521	9,305	22,396	28,666
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,313	$ 563	$ 2,959	$ 1,081