Note 2 - Revenue Recognition (Tables)

12 Months Ended

Sep. 30, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	YEAR ENDED SEPTEMBER 30,
	2024		2023
Oil and Gas Markets
Traditional exploration product revenue	$	9,666	$	12,081
Wireless exploration product revenue		48,094		10,168
Reservoir product revenue		596		962
Total revenue		58,356		23,211
Adjacent Markets
Industrial product revenue		43,058		36,859
Imaging product revenue		12,400		12,029
Total revenue		55,458		48,888
Emerging Markets
Revenue		2,222		1,234
Total	$	116,036	$	73,333

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

	YEAR ENDED SEPTEMBER 30,
	2024		2023
Asia (including Russian Federation)	$	43,831	$	13,006
Canada		1,578		1,032
Europe		6,430		5,976
Mexico		1,959		1,792
South America		384		448
United States		61,009		49,828
Other		845		1,251
	$	116,036	$	73,333