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MARKETABLE SECURITIES (Tables) | 12 Months Ended
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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).

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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