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MARKETABLE SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2015
Available-For-Sale Securities [Abstract]  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
 
 
 
 
December 31
 
 
 
Maturity year
 
2015
 
2014
 
 
 
 
 
U.S. dollars in thousands
 
 
 
 
 
 
 
 
 
Short-term (a):
 
 
 
 
 
 
 
 
 
Municipal bond
 
 
 
$
4,446
 
$
4,408
 
Corporate bond
 
 
 
 
705
 
 
630
 
 
 
 
 
$
5,151
 
$
5,038
 
 
 
 
 
 
 
 
 
 
 
Long-term - security bond (b)
 
Perpetual
 
$
1,441
 
$
1,574
 
 
a.
The Company invests in highly-rated marketable securities, and its policy limits the amount of credit exposure to any one issuer. The Company’s investment policy requires investments to be investment grade, rated single-A or better, with the objective of minimizing the potential risk of principal loss. Fair values were determined for each individual security in the investment portfolio based on quoted prices in active markets.
 
b.
As of December 31, 2015 the Company held a long-term security bond which is classified as available for sale security and is presented on its fair value. The fair value of the available-for-sale security based on quoted prices in active markets for identical instruments (Level 1 as defined under ASC_820).