Note 2 - Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2025

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Nine Months Ended
	June 30, 2025		June 30, 2024		June 30, 2025		June 30, 2024
Smart Water	$	10,518	$	9,913	$	27,278	$	20,558
Energy Solutions		6,612		3,862		29,837		43,948
Intelligent Industrial		6,097		6,448		17,465		18,928
Total	$	23,227	$	20,223	$	74,580	$	83,434

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

	Three Months Ended				Nine Months Ended
	June 30, 2025		June 30, 2024		June 30, 2025		June 30, 2024
Asia (including Russian Federation)	$	1,684	$	3,430	$	21,552	$	39,318
Canada		1,022		178		2,017		2,406
Europe		1,723		1,137		4,311		4,022
Mexico		240		601		2,332		971
United States		18,343		14,436		43,768		35,685
Other		215		441		600		1,032
Total	$	23,227	$	20,223	$	74,580	$	83,434