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Investments (Tables)
9 Months Ended
Sep. 30, 2020
Investments  
Schedule of Investments

September 30, 2020

    

    

Gross Unrealized

    

Gross Unrealized

    

Amortized Cost

Gains

(Losses)

Fair Value

Investments - debt securities:

 

  

 

  

 

  

 

  

U.S. Treasury Bills

$

49,973

$

4

$

(2)

$

49,975

Corporate debt securities

60

60

 

50,033

 

4

 

(2)

 

50,035

Restricted investments:

 

  

 

  

 

  

 

  

Short-term bond

 

1,170

 

10

 

 

1,180

 

1,170

 

10

 

 

1,180

$

51,203

$

14

$

(2)

$

51,215

December 31, 2019

    

    

Gross Unrealized

    

Gross Unrealized

    

Amortized Cost

Gains

(Losses)

Fair Value

Investments - debt securities:

 

  

 

  

 

  

 

  

Corporate debt securities

$

178

$

$

(125)

$

53

 

178

 

 

(125)

 

53

Restricted investments:

 

  

 

  

 

  

 

  

Short-term bond

 

2,239

 

11

 

 

2,250

Money market fund

 

114

 

 

 

114

 

2,353

 

11

 

 

2,364

$

2,531

$

11

$

(125)

$

2,417

Schedule of Unrealized Loss Position and Related Fair Value of Investments

September 30, 2020

Less Than 12 Months

12 Months or Greater

Unrealized

Unrealized

    

Fair Value

    

Losses

    

Fair Value

    

Losses

Investments - debt securities:

 

  

 

  

 

  

 

  

U.S. Treasury Bills

$

25,990

$

2

$

$

December 31, 2019

Less Than 12 Months

12 Months or Greater

Unrealized

Unrealized

    

Fair Value

    

Losses

    

Fair Value

    

Losses

Investments - debt securities:

 

  

 

  

 

  

 

  

Corporate debt securities

$

$

$

53

$

125

Schedule of Contractual Maturities of Investments

September 30, 2020

    

Amortized Cost

    

Fair Value

Due in one year or less

$

50,033

$

50,035

Restricted investments

 

1,170

 

1,180

$

51,203

$

51,215