Contract assets and contract liabilities (Tables)

6 Months Ended

Jun. 30, 2020

Contract assets and contract liabilities

Schedule of contract asset, net and contract liability, net balance from customers

	Contract		Contract
	Assets, Net		Liabilities, Net
Balance at December 31, 2019	$	967	$	227,889
Balance at June 30, 2020		864		233,428
Change	$	(103)	$	5,539

Schedule of remaining performance obligations included in revenue

	Three Months Ended		Six Months Ended
	June 30, 2020		June 30, 2020
Amounts included in the beginning of period contract liability balance	$	21,136	$	46,106
Amounts associated with performance obligations satisfied in previous periods		6		19