Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 26,123	$ 19,247	$ 43,998	$ 33,891
Income (loss) from operations	1,022	(5,222)	(5,041)	(14,827)
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	18,669	11,287	29,673	19,326
Income (loss) from operations	3,332	(3,757)	731	(11,430)
Operating Segments | Adjacent Markets
Segment Reporting Information [Line Items]
Revenue	7,259	7,826	13,894	14,280
Income (loss) from operations	1,651	1,384	2,633	2,413
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	46		134
Income (loss) from operations	(1,180)		(2,372)
Corporate
Segment Reporting Information [Line Items]
Revenue	149	134	297	285
Income (loss) from operations	$ (2,781)	$ (2,849)	$ (6,033)	$ (5,810)