Note 12 - Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	$ 24,270	$ 31,370	$ 74,302	$ 62,479
Income (loss) from operations	(4,506)	4,377	8,331	4,098
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	75	52	149	98
Income (loss) from operations	(3,516)	(1,847)	(6,651)	(5,066)
Oil and Gas Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	10,847	18,419	50,756	38,567
Income (loss) from operations	(3,135)	4,176	11,428	6,582
Adjacent Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	12,235	12,708	22,050	23,530
Income (loss) from operations	2,796	3,055	4,830	4,802
Emerging Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	1,113	191	1,347	284
Income (loss) from operations	$ (651)	$ (1,007)	$ (1,276)	$ (2,220)