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Investments (Tables)
 6 Months Ended
Jun. 30, 2022
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 June 30, 2022, and December 31, 2021.

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June 30, 2022

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December 31, 2021

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Amortized

    

Market

    

Amortized

    

Market

​

    

Cost

    

Value

    

Cost

    

Value

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(Dollars in thousands)

Municipal bonds:

 

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​

  

 

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Current

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$

702

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$

703

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$

219

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$

223

Due from one through five years

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5,224

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5,257

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6,503

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6,805

Due from six through ten years

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2,505

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2,595

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2,479

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2,790

Due from eleven through twenty years

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799

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761

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1,014

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1,102

Total

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$

9,230

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$

9,316

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$

10,215

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$

10,920
Schedule of Unrealized gains and losses on marketable securities

The unrealized gains and losses on marketable securities at June 30, 2022, and at December 31, 2021, were as follows:

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June 30, 2022

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December 31, 2021

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Unrealized

    

Unrealized

    

Unrealized

    

Unrealized

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Gains

    

Losses

    

Gains

    

Losses

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(Dollars in thousands)

Municipal bonds

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$

170

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$

(84)

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$

705

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$

—

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