Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2020

Revenue Recognition

Schedule of changes in contract assets and liabilities

The following table presents changes in our contract assets and liabilities during the three months ended March 31, 2019 and 2020 (in thousands):

			Revenue
	Balance at		Recognized
	Beginning of		In Advance of				Balance at End of
	Period		Billings		Billings		Period
Three months ended March 31, 2019
Contract assets:
Unbilled receivables	$	3,279	$	1,059	$	(420)	$	3,918
Three months ended March 31, 2020
Contract assets:
Unbilled receivables	$	3,315	$	183	$	(273)	$	3,225

	Balance at
	Beginning of				Revenue		Balance at End of
	Period		Billings		Recognized		Period
Three months ended March 31, 2019
Contract liabilities:
Deferred revenue	$	3,099	$	772	$	(1,355)	$	2,516
Three months ended March 31, 2020
Contract liabilities:
Deferred revenue	$	2,837	$	1,148	$	(1,368)	$	2,617