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Fair-Value Measurements (Tables)
12 Months Ended
Dec. 31, 2020
Fair-Value Measurements  
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

    

December 31, 2020

    

Level 1

    

Level 2

    

Level 3

    

Total

(In thousands)

Assets:

Money-market funds classified as non-current restricted investments

$

1,055

$

$

$

1,055

Money-market funds classified as short-term investments

 

124,452

 

 

 

124,452

Total

$

125,507

$

$

$

125,507

    

December 31, 2019

    

Level 1

    

Level 2

    

Level 3

    

Total

(In thousands)

Assets:

  

 

  

 

  

 

  

Money-market funds classified as non-current restricted investments

$

1,154

$

$

$

1,154

Money-market funds classified as short-term investments

 

57,704

 

 

 

57,704

Total

$

58,858

$

$

$

58,858