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):
The table above excludes liability for sales returns, as they are insignificant.
Tabular disclosure of contract balances and changes in contract balances.
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef