Note 2 - Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Nine Months Ended
	June 30, 2024		June 30, 2023		June 30, 2024		June 30, 2023
Oil and Gas Markets
Traditional exploration product revenue	$	2,005	$	3,363	$	7,239	$	9,414
Wireless exploration product revenue		1,460		907		36,008		8,077
Reservoir product revenue		189		523		303		810
Total revenue		3,654		4,793		43,550		18,301
Adjacent Markets
Industrial product revenue		13,026		11,678		28,492		29,250
Imaging product revenue		2,903		3,147		9,405		9,032
Total revenue		15,929		14,825		37,897		38,282
Emerging Markets
Revenue		640		109		1,987		393
Total	$	20,223	$	19,727	$	83,434	$	56,976

Revenue from External Customers by Geographic Areas [Table Text Block]

	Three Months Ended				Nine Months Ended
	June 30, 2024		June 30, 2023		June 30, 2024		June 30, 2023
Asia (including Russian Federation)	$	3,430	$	3,287	$	39,318	$	11,264
Canada		178		85		2,406		1,179
Europe		1,137		1,856		4,022		4,782
United States		14,436		13,481		35,685		37,551
Other		1,042		1,018		2,003		2,200
Total	$	20,223	$	19,727	$	83,434	$	56,976