Revenue Recognition (Tables)

6 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Summary of Revenue from the Sale of Products and 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 from the sale of products and services under contracts with customers.  The table excludes all revenue earned from rental contracts (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2019		March 31, 2018		March 31, 2019		March 31, 2018
Oil and Gas Markets
Traditional exploration product revenue	$	3,261	$	2,490	$	5,987	$	6,089
Wireless exploration product revenue		310		1,558		454		4,181
Reservoir product revenue		994		2,060		1,882		2,678
Total revenue		4,565		6,108		8,323		12,948
Adjacent Markets
Industrial product revenue		4,120		4,711		7,682		8,387
Imaging product revenue		3,114		3,091		6,165		5,849
Total revenue		7,234		7,802		13,847		14,236
Emerging Markets
Revenue		46		—		134		—
Total	$	11,845	$	13,910	$	22,304	$	27,184

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 from the sale of products and services under contracts with customers.  The table excludes all revenue earned from rental contracts (in thousands):  

	Three Months Ended				Six Months Ended
	March 31, 2019		March 31, 2018		March 31, 2019		March 31, 2018
Asia	$	1,510	$	1,253	$	3,068	$	2,259
Canada		342		345		630		710
Europe		1,170		917		2,085		4,336
United States		8,265		11,338		14,875		19,361
Other		558		57		1,646		518
Total	$	11,845	$	13,910	$	22,304	$	27,184