| REVENUE RECOGNITION (Tables) | 12 Months Ended | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2018 | |||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||
| Contract with Customer, Asset and Liability | 
The following table presents changes in these contract liability balances for the year ended December 31, 2018 (U.S. dollars in thousands):
 
 The table above excludes liability for sales returns, as they are insignificant. | ||||||||||||||||||||||||||||
| X | ||||||||||
| 
- Definition Tabular disclosure of contract balances and changes in contract balances. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- References No definition available. 
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