Segment Information - Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 25,698	$ 17,875
Income (loss) from operations	170	(6,063)
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	19,502	11,004
Income (loss) from operations	4,099	(2,601)
Operating Segments | Adjacent Markets
Segment Reporting Information [Line Items]
Revenue	6,099	6,635
Income (loss) from operations	851	982
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	97	88
Income (loss) from operations	(1,365)	(1,192)
Corporate
Segment Reporting Information [Line Items]
Revenue		148
Income (loss) from operations	$ (3,415)	$ (3,252)