Revenue Recognition (Tables)

12 Months Ended

Sep. 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):

	YEAR ENDED SEPTEMBER 30,
	2019		2018
Oil and Gas Markets Product and Services Revenue:
Traditional exploration	$	8,712	$	11,795
Wireless exploration		4,362		6,851
Reservoir		2,554		4,533
Total revenue		15,628		23,179
Adjacent Markets Product and Services Revenue:
Industrial		18,324		18,352
Imaging		11,736		11,489
Total revenue		30,060		29,841
Emerging Markets Product and Services Revenue:
Revenue		159		286
Total	$	45,847	$	53,306

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:  

	YEAR ENDED SEPTEMBER 30,
	2019		2018
Asia	$	6,025	$	2,143
Canada		2,558		13,044
Europe		6,569		4,652
United States		28,763		31,296
Other		1,932		2,171
	$	45,847	$	53,306