Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Tables)

Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Asset and Liability
The following table presents changes in these contract liability balances for the six-month period ended June 30, 2019 (U.S. dollars in thousands):
Outstanding at December 31, 2018

Increase (decrease) attributed to:

Customer loyalty net deferrals 

Customer loyalty redemptions 
Outstanding at June 30, 2019

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