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	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 21,604	$ 9,517	$ 48,326	$ 18,600
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	21,604	9,517	48,326	18,600
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	1,093	830	12,466	1,275
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	481	794	888	1,267
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	1,704	1,259	2,879	2,672
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	18,055	6,184	31,419	12,781
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 271	$ 450	$ 674	$ 605