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PROPERTY AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2017
PROPERTY AND EQUIPMENT [Abstract]  
Schedule of Property and Equipment
Composition of property and equipment grouped by major classifications is as follows:
 
 
 
December 31,
 
(U.S. dollars in thousands)
 
2016
 
2017
 
Laboratory equipment
 
$
16,265
 
$
16,561
 
Furniture and computer equipment
 
 
2,342
 
 
2,438
 
Leasehold improvements
 
 
15,678
 
 
16,123
 
Equipment under construction
 
 
19
 
 
19
 
 
 
$
34,304
 
$
35,141
 
Less – accumulated depreciation
 
 
 
 
 
 
 
and amortization
 
 
(25,601)
 
 
(27,465)
 
 
 
$
8,703
 
$
7,676