Note 14 - Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 32,715	$ 20,691	$ 95,194	$ 63,382
Income (loss) from operations	3,146	(6,534)	7,244	(15,069)
Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	72	101	170	182
Income (loss) from operations	(3,391)	(3,275)	(8,457)	(9,592)
Oil and Gas Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	17,672	9,517	56,239	34,317
Income (loss) from operations	3,238	(3,695)	9,820	(6,209)
Adjacent Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	14,862	10,938	38,392	28,312
Income (loss) from operations	4,346	1,841	9,148	4,341
Emerging Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	109	135	393	571
Income (loss) from operations	$ (1,047)	$ (1,405)	$ (3,267)	$ (3,609)