Revenue Recognition - Summary of Revenue from the Sale of Products and Performance of Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Operating Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 75,864	$ 34,136
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	75,864	34,136
Operating Segments | Oil and Gas Markets
Disaggregation Of Revenue [Line Items]
Total revenue	33,411	8,075
Operating Segments | Oil and Gas Markets | Traditional Exploration Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	4,518	5,849
Operating Segments | Oil and Gas Markets | Wireless Exploration Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	27,016	1,421
Operating Segments | Oil and Gas Markets | Reservoir Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	1,877	805
Operating Segments | Adjacent Markets Product and Services Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	32,260	25,327
Operating Segments | Adjacent Markets Product and Services Revenue | Industrial Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	21,335	15,622
Operating Segments | Adjacent Markets Product and Services Revenue | Imaging Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	10,925	9,705
Operating Segments | Emerging Markets
Disaggregation Of Revenue [Line Items]
Total revenue	$ 10,193	$ 734