Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 95,809	$ 75,748
Income (loss) from operations	1,033	(20,743)
Depreciation and amortization expenses	19,339	14,412
Impairment, inventory obsolescence and stock-based compensation expenses	6,943	7,244
Interest income	1,308	1,083
Interest expense	99	336
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	64,966	44,951
Income (loss) from operations	3,095	(14,070)
Depreciation and amortization expenses	16,865	13,348
Impairment, inventory obsolescence and stock-based compensation expenses	6,046	6,243
Interest income	1,033	614
Interest expense		2
Operating Segments | Adjacent Markets
Segment Reporting Information [Line Items]
Revenue	30,156	29,932
Income (loss) from operations	6,234	5,345
Depreciation and amortization expenses	466	490
Impairment, inventory obsolescence and stock-based compensation expenses	92	164
Interest income	1
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	159	286
Income (loss) from operations	(2,306)	(718)
Depreciation and amortization expenses	1,164	194
Impairment, inventory obsolescence and stock-based compensation expenses	68	14
Interest expense		1
Corporate
Segment Reporting Information [Line Items]
Revenue	528	579
Income (loss) from operations	(5,990)	(11,300)
Depreciation and amortization expenses	844	380
Impairment, inventory obsolescence and stock-based compensation expenses	737	823
Interest income	274	469
Interest expense	$ 99	$ 333