Note 14 - Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 31,370	$ 24,700	$ 62,479	$ 42,691
Income (loss) from operations	4,377	(1,649)	4,098	(8,535)
Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	52	52	98	81
Income (loss) from operations	(1,847)	(3,213)	(5,066)	(6,317)
Oil and Gas Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	18,419	15,146	38,567	24,800
Income (loss) from operations	4,176	1,656	6,582	(2,514)
Adjacent Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	12,708	9,203	23,530	17,374
Income (loss) from operations	3,055	1,292	4,802	2,500
Emerging Markets [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	191	299	284	436
Income (loss) from operations	$ (1,007)	$ (1,384)	$ (2,220)	$ (2,204)