Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Geographic Areas

The following table summarizes net sales by end market:

(in thousands)	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
End Market	2020		2019		2020		2019
Energy	$	33,813	$	64,331	$	113,546	$	162,224
Industrial	29,843		37,020		97,437		142,267
Transportation	50,794		37,161		101,620		88,492
Total	$	114,450	$	138,512	$	312,603	$	392,983

The following table summarizes net sales by geographic area:

(in thousands)	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
Geographic Area	2020		2019		2020		2019
North America	$	104,840	$	125,971	$	281,339	$	343,593
Pacific Rim	5,466		6,744		18,215		30,173
Europe	2,395		4,329		7,630		12,712
Other	1,749		1,468		5,419		6,505
Total	$	114,450	$	138,512	$	312,603	$	392,983

Schedule of Contract Balances

(in thousands)	As of September 30, 2020		As of December 31, 2019
Short-term contract assets (included in Prepaid expenses and other current assets)	$	8,601	$	694
Short-term contract liabilities (included in Other accrued liabilities)	(52,502)		(26,898)
Long-term contract liabilities (included in Noncurrent contract liabilities)	(10,009)		(17,998)
Net contract liabilities	$	(53,910)	$	(44,202)