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MARKETABLE SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract] |
Schedule of Marketable Securities |
| June 30, 2019
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Municipal bonds | $ | 29,495 |  |  | $ | 156 |  |  | $ | (5 | ) |  | $ | 29,646 |
Corporate bonds | 29,620 |  |  | 291 |  |  | (8 | ) |  | 29,903 |
| $ | 59,115 |  |  | $ | 447 |  |  | $ | (13 | ) |  | $ | 59,549 |
| December 31, 2018
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Municipal bonds | $ | 44,802 |  |  | $ | 13 |  |  | $ | (110 | ) |  | $ | 44,705 |
Corporate bonds | 48,499 |  |  | 23 |  |  | (226 | ) |  | 48,296 |
| $ | 93,301 |  |  | $ | 36 |  |  | $ | (336 | ) |  | $ | 93,001 |

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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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