Revenue Recognition (Tables)

3 Months Ended

Dec. 31, 2018

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
	December 31, 2018		December 31, 2017
Oil and Gas Markets
Traditional exploration product revenue	$	2,726	$	3,599
Wireless exploration product revenue		144		2,623
Reservoir product revenue		888		618
Total revenue		3,758		6,840
Adjacent Markets
Industrial product revenue		3,562		3,676
Imaging product revenue		3,051		2,758
Total revenue		6,613		6,434
Emerging Markets
Revenue		88		—
Total	$	10,459	$	13,274

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
	December 31, 2018		December 31, 2017
Asia	$	1,558	$	1,006
Canada		288		365
Europe		915		3,419
United States		6,610		8,023
Other		1,088		461
Total	$	10,459	$	13,274