Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability

The following table presents changes in these contract liability balances for the three-month period ended March 31, 2020 (U.S. dollars in thousands):

Outstanding at December 31, 2019	$	955
Increase (decrease) attributed to:
Customer loyalty net deferrals	944
Customer loyalty redemptions	(972)
Outstanding at March 31, 2020	$	927

The table above excludes liability for sales returns, as they are insignificant.