Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 94,864	$ 87,835
Income (loss) from operations	(16,871)	(18,039)
Depreciation and amortization expenses	20,777	23,693
Impairment, inventory obsolescence and stock-based compensation expenses	4,971	7,702
Interest income	1,441	1,102
Interest expense		38
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	52,252	61,661
Income (loss) from operations	(16,229)	(2,139)
Depreciation and amortization expenses	18,199	21,192
Impairment, inventory obsolescence and stock-based compensation expenses	3,850	6,326
Interest income	1,409	1,029
Operating Segments | Adjacent Markets Product and Services Revenue
Segment Reporting Information [Line Items]
Revenue	32,419	25,440
Income (loss) from operations	6,423	4,017
Depreciation and amortization expenses	440	453
Impairment, inventory obsolescence and stock-based compensation expenses	223	232
Interest income	1	3
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	10,193	734
Income (loss) from operations	5,033	(6,064)
Depreciation and amortization expenses	1,209	1,194
Impairment, inventory obsolescence and stock-based compensation expenses	100	203
Corporate
Segment Reporting Information [Line Items]
Income (loss) from operations	(12,098)	(13,853)
Depreciation and amortization expenses	929	854
Impairment, inventory obsolescence and stock-based compensation expenses	798	941
Interest income	$ 31	70
Interest expense		$ 38