Revenue Recognition (Tables)

3 Months Ended

Dec. 31, 2020

Revenue From Contract With Customer [Abstract]

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

For each of the Company’s operating segments, the following table presents revenue only from the sale of products and the performance of services under contracts with customers (in thousands).  Therefore, the table excludes all revenue earned from rental contracts.

	Three Months Ended
	December 31, 2020		December 31, 2019
Oil and Gas Markets
Traditional exploration product revenue	$	997	$	2,330
Wireless exploration product revenue		10,029		404
Reservoir product revenue		29		180
Total revenue		11,055		2,914
Adjacent Markets
Industrial product revenue		4,407		3,596
Imaging product revenue		2,463		2,476
Total revenue		6,870		6,072
Emerging Markets
Revenue		8,797		97
Total	$	26,722	$	9,083

Summary of Revenue from the Sale of Products and Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Geographic Areas

For each of the geographic areas where the Company operates, the following table presents revenue (in thousands) from the sale of products and services under contracts with customers.  The table excludes all revenue earned from rental contracts:  

	Three Months Ended
	December 31, 2020		December 31, 2019
Asia	$	11,373	$	445
Canada		407		473
Europe		1,175		1,413
United States		13,364		6,597
Other		403		155
Total	$	26,722	$	9,083