Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2021

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				Nine Months Ended
	June 30, 2021		June 30, 2020		June 30, 2021		June 30, 2020
Oil and Gas Markets
Traditional exploration product revenue	$	1,949	$	1,162	$	3,736	$	4,749
Wireless exploration product revenue		4,264		453		26,923		1,336
Reservoir product revenue		1,071		187		1,565		704
Total revenue		7,284		1,802		32,224		6,789
Adjacent Markets
Industrial product revenue		6,451		3,403		15,835		11,185
Imaging product revenue		2,883		1,682		7,923		7,044
Total revenue		9,334		5,085		23,758		18,229
Emerging Markets
Revenue		1,061		88		10,023		557
Total	$	17,679	$	6,975	$	66,005	$	25,575

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				Nine Months Ended
	June 30, 2021		June 30, 2020		June 30, 2021		June 30, 2020
Asia	$	4,088	$	925	$	16,554	$	2,200
Canada		279		509		1,167		1,776
Europe		3,223		1,193		6,102		3,865
United States		9,401		4,087		40,820		16,868
Other		688		261		1,362		866
Total	$	17,679	$	6,975	$	66,005	$	25,575