Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Contract Liabilities

Following is a rollforward of the Company's contract liabilities (in thousands):

Balance, December 31, 2018	$	4,304
Deduction for recognition of revenue	(4,827)
Increase for deferral of shortfall payments	8,442
Increase for deferral of customer prepayments	675
Deduction of shortfall payments due to contract renegotiations	(1,350)
Balance, December 31, 2019	7,244
Deduction for recognition of revenue	(9,897)
Increase for deferral of shortfall payments	12,036
Increase for deferral of customer prepayments	212
Balance, June 30, 2020	$	9,595