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SIGNIFICANT ACCOUNTING POLICIES - Amortized cost basis, fair value and net unrealized gains of available-for-sale securities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | $ 7,674 | $ 13,101
Fair Value | 7,665 | 13,031
Net Unrealized Loss | (9) | (70)
Municipal Obligations |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 1,490 | 13,101
Fair Value | 1,490 | 13,031
Net Unrealized Loss | 0 | (70)
Corporate Obligations |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 6,184 | 0
Fair Value | 6,175 | 0
Net Unrealized Loss | $ (9) | $ 0

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
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X
- Definition Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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