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INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2020
INVESTMENTS |
Schedule of Marketable securities | Below is a summary of the amortized cost and estimated market values of the Company’s marketable securities as of December 31, 2020 and 2019. The estimated market values provided are Level 2 valuations as defined by ASC 820.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2020 | ​ | 2019
​ | ​ | Amortized | ​ | Market | ​ | Amortized | ​ | Market
​ |  | Cost |  | Value |  | Cost |  | Value
​ | ​ | (Dollars in thousands)
Municipal bonds: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Current | ​ | $ | 2,215 | ​ | $ | 2,249 | ​ | $ | 5,904 | ​ | $ | 5,915
Due from one through five years | ​ |  | 7,420 | ​ |  | 7,830 | ​ |  | 8,336 | ​ |  | 8,621
Due from six through ten years | ​ |  | 3,057 | ​ |  | 3,608 | ​ |  | 4,255 | ​ |  | 4,618
Due from eleven through twenty years | ​ |  | 2,323 | ​ |  | 2,547 | ​ |  | 3,223 | ​ |  | 3,430
Total | ​ | $ | 15,015 | ​ | $ | 16,234 | ​ | $ | 21,718 | ​ | $ | 22,584
​
Schedule of Unrealized gains and losses | The unrealized gains and losses on marketable securities at December 31, 2020 and 2019 were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2020 | ​ | 2019
​ |  | Unrealized |  | Unrealized |  | Unrealized |  | Unrealized
​ |  | Gains |  | Losses |  | Gains |  | Losses
​ | ​ | (Dollars in thousands)
Municipal bonds | ​ | $ | 1,219 | ​ | $ | — | ​ | $ | 866 | ​ | $ | —
​

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