Revenue Recognition (Tables)

6 Months Ended

Mar. 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				Six Months Ended
	March 31, 2020		March 31, 2019		March 31, 2020		March 31, 2019
Oil and Gas Markets
Traditional exploration product revenue	$	1,257	$	3,261	$	3,587	$	5,987
Wireless exploration product revenue		479		310		883		454
Reservoir product revenue		337		994		517		1,882
Total revenue		2,073		4,565		4,987		8,323
Adjacent Markets
Industrial product revenue		4,186		4,120		7,782		7,682
Imaging product revenue		2,886		3,114		5,362		6,165
Total revenue		7,072		7,234		13,144		13,847
Emerging Markets
Revenue		372		46		469		134
Total	$	9,517	$	11,845	$	18,600	$	22,304

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				Six Months Ended
	March 31, 2020		March 31, 2019		March 31, 2020		March 31, 2019
Asia	$	830	$	1,510	$	1,275	$	3,068
Canada		794		342		1,267		630
Europe		1,259		1,170		2,672		2,085
United States		6,184		8,265		12,781		14,875
Other		450		558		605		1,646
Total	$	9,517	$	11,845	$	18,600	$	22,304