Revenue (Tables)

6 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Summary of Contract Asset and Liabilities

Contract assets and liabilities as of March 31, 2020 and September 30, 2019 are summarized below (in thousands):

	March 31, 2020			September 30, 2019
Contract assets	$	61,336		$	55,374
Contract liabilities	(57,821		)	(71,464		)
Net contract asset (liability)	$	3,515		$	(16,090	)

Disaggregation of Revenue

The following tables present our disaggregated revenue by geographic destination and market sector for the six months ended March 31, 2020 and 2019 (in thousands):

	Three months ended March 31,				Six months ended March 31,
	2020		2019		2020		2019
United States	$	121,432	$	102,406	$	228,510	$	192,304
Canada	15,407		15,094		29,861		24,809
Europe, Middle East and Africa	8,816		5,508		18,982		10,949
Asia/Pacific	5,456		729		7,142		4,473
Mexico, Central and South America	459		—		1,225		553
Total revenues by geographic destination	$	151,570	$	123,737	$	285,720	$	233,088

	Three months ended March 31,				Six months ended March 31,
	2020		2019		2020		2019
Oil and gas	$	51,954	$	56,022	$	111,948	$	105,598
Petrochemical	47,337		22,523		77,763		42,301
Electric utility	24,255		20,383		47,270		39,641
Traction power	13,944		6,025		22,295		11,034
All others	14,080		18,784		26,444		34,514
Total revenues by market sector	$	151,570	$	123,737	$	285,720	$	233,088