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Investments
 12 Months Ended
Dec. 31, 2018
C3J [Member]  
Investments

4.      Investments

The following table summarizes our short term available-for-sale investments as of December 31, 2017. We did not have any available-for-sale investments as of December 31, 2018.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    

 

    

Gross

    

Gross

    

 

 

 

Amortized

 

Unrealized

 

Unrealized

 

 

 

 

Cost

 

Gains

 

Losses

 

Fair Value

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

9,658,000 

 

$

— 

 

$
(7,000)

 

$

9,651,000 

Total

 

$

9,658,000 

 

$

— 

 

$
(7,000)

 

$

9,651,000 

 

There were no other-than-temporary impairments recognized in accumulated other comprehensive income (loss) as of December 31, 2018 and 2017.

The Company has the right to sell investments prior to the stated contractual maturity date. The proceeds from sales and maturities of available-for-sale securities were $13,016,000 and $24,993,000 for the years ended December 31, 2018 and 2017, respectively. The gross realized gains (losses) that have been included in earnings as a result of those sales were not material for the years ended December 31, 2018 and 2017.