Segment Information - Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 25,907	$ 26,123	$ 51,605	$ 43,998
Income (loss) from operations	(11,482)	1,022	(11,312)	(5,041)
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	18,434	18,669	37,936	29,673
Income (loss) from operations	(6,683)	3,332	(2,584)	731
Operating Segments | Adjacent Markets
Segment Reporting Information [Line Items]
Revenue	7,101	7,259	13,200	13,894
Income (loss) from operations	1,214	1,651	2,065	2,633
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	372	46	469	134
Income (loss) from operations	(2,500)	(1,180)	(3,865)	(2,372)
Corporate
Segment Reporting Information [Line Items]
Revenue		149		297
Income (loss) from operations	$ (3,513)	$ (2,781)	$ (6,928)	$ (6,033)