Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2019

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.  The table excludes all revenue earned from rental contracts (in thousands):

	Three Months Ended				Nine Months Ended
	June 30, 2019		June 30, 2018		June 30, 2019		June 30, 2018
Oil and Gas Markets
Traditional exploration product revenue	$	2,129	$	2,424	$	8,116	$	8,513
Wireless exploration product revenue		1,381		273		1,835		4,454
Reservoir product revenue		421		1,819		2,303		4,497
Total revenue		3,931		4,516		12,254		17,464
Adjacent Markets
Industrial product revenue		5,364		5,674		13,046		14,061
Imaging product revenue		2,847		3,080		9,012		8,929
Total revenue		8,211		8,754		22,058		22,990
Emerging Markets
Revenue		11		—		145		—
Total	$	12,153	$	13,270	$	34,457	$	40,454

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, 2019		June 30, 2018		June 30, 2019		June 30, 2018
Asia	$	1,094	$	1,207	$	4,162	$	3,466
Canada		1,202		699		1,832		1,409
Europe		1,023		1,496		3,108		5,832
United States		7,521		9,305		22,396		28,666
Other		1,313		563		2,959		1,081
Total	$	12,153	$	13,270	$	34,457	$	40,454