Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of contract assets and liabilities

The following table summarizes the changes in the unbilled AR and deferred revenue balances for the six months ended June 30, 2020 (in thousands):

Unbilled AR, December 31, 2019	$	2,667
Additions	104
Transferred to trade receivable	(1,479)
Unbilled AR, June 30, 2020	$	1,292

Deferred revenue, December 31, 2019	$	24,808
Additions	13,548
Revenue recognized	(13,260)
Deferred revenue, June 30, 2020	$	25,096