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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Summary of Assets that Require Fair Value Measurements on Recurring Basis and Their Respective Input Levels Based on Fair Value Hierarchy

The following tables summarize the Company’s assets that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy (in thousands):

 

 

 

 

 

 

Fair Value Measurements Using

 

 

 

 

 

 

Quoted Prices in

 

 

Significant

 

 

Significant

 

 

 

 

 

 

Active Markets

 

 

Other

 

 

Unobservable

 

 

 

March 31,

 

 

for Identical

 

 

Observable

 

 

Inputs

 

 

 

2021

 

 

Assets (Level 1)

 

 

Inputs (Level 2)

 

 

(Level 3)

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. treasury securities

 

$

52,727

 

 

$

52,727

 

 

$

-

 

 

$

-

 

Certificates of deposit

 

 

491

 

 

 

491

 

 

 

-

 

 

 

-

 

Total

 

$

53,218

 

 

$

53,218

 

 

$

-

 

 

$

-

 

 

 

 

 

 

 

Fair Value Measurements Using

 

 

 

 

 

 

Quoted Prices in

 

 

Significant

 

 

Significant

 

 

 

 

 

 

Active Markets

 

 

Other

 

 

Unobservable

 

 

 

December 31,

 

 

for Identical

 

 

Observable

 

 

Inputs

 

 

 

2020

 

 

Assets (Level 1)

 

 

Inputs (Level 2)

 

 

(Level 3)

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. treasury securities

 

$

56,220

 

 

$

56,220

 

 

$

-

 

 

$

-

 

Certificates of deposit

 

 

1,961

 

 

 

1,961

 

 

 

-

 

 

 

-

 

Total

 

$

58,181

 

 

$

58,181

 

 

$

-

 

 

$

-