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MARKETABLE SECURITIES (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Long-term - security bond Maturity year | Perpetual | [1] |  |
Short-term - security bond | $ 5,038 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent | [2] | $ 2,836 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent | [2]
Long-term - security bond | 1,574 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent | [1] | 517 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent | [1]
Municipal bond [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Short-term - security bond | 4,408 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | [2] | 2,757 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember | [2]
Corporate bond [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Short-term - security bond | $ 630 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | [2] | $ 79 us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent / us-gaap_InvestmentTypeAxis = us-gaap_CorporateBondSecuritiesMember | [2]
[1] | As of December 31, 2014 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 securities based on quoted prices in active markets for identical instruments (Level 1 as defined under ASC820).
[2] | 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.

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