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, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 64,109	$ 75,864
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	64,109	75,864
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	10,978	17,268
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	890	1,550
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	15,705	7,693
Operating Segments | South America
Disaggregation Of Revenue [Line Items]
Total revenue	719	287
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	33,778	47,101
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 2,039	$ 1,965