December 31,

 

(U.S. dollars in thousands)

 

2015

 

2016

 

Raw materials

 

$

1,180

 

$

2,591

 

Work in progress

 

 

 

 

 

395

 

Finished goods

 

 

4,587

 

 

2,259

 

Total inventory

 

$

5,767

 

$

5,245