Revenue recognition (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

The following table reflects the change in contract liabilities between December 31, 2019 and June 30, 2020.



	Contract liabilities
Balance at December 31, 2019	$	62,054
Revenue recognized that was included in the contract liability at the beginning of the year	(18,621		)
Increase, excluding amounts recognized as revenue during the period	22,299
Balance at June 30, 2020	$	65,732

Remaining Performance Obligation

The following table illustrates estimated revenues expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of June 30, 2020. The Company has elected to exclude short term contracts, sales and usage based royalties and any other variable consideration recognized on an “as invoiced” basis.



Contract liabilities to be recognized in:	Amount
Remainder of 2020	$	28,973
2021	5,129
2022	3,616
2023	3,509
2024	3,249
Thereafter	21,256
Total	$	65,732