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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
Fair Value Measurements  
Summary of Financial Assets Measured at Fair Value on Recurring Basis

Fair value measurement as of June 30, 2023:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Quoted prices in

​

Significant other

​

Significant

Financial assets

​

​

​

​

active markets for

​

observable

​

unobservable

​

​

​

​

​

identical assets

​

inputs

​

inputs

Type of Instrument

    

Total

    

(Level 1)

    

(Level 2)

    

(Level 3)

Cash and cash equivalents:

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds and checking accounts

​

$

58,249

​

$

58,249

​

$

—

​

$

—

Available-for-sale marketable securities:

​

 

​

​

 

  

​

 

​

​

 

​

U.S. government agency obligations

​

 

9,003

​

 

—

​

 

9,003

​

 

—

Corporate bonds

​

 

19,675

​

 

—

​

 

19,675

​

 

—

Municipal bonds

​

 

14,817

​

 

—

​

 

14,817

​

 

—

Restricted cash:

​

 

​

​

 

  

​

 

​

​

 

​

Commercial money market account

​

 

1,908

​

 

1,908

​

 

—

​

 

—

Total financial assets

​

$

103,652

​

$

60,157

​

$

43,495

​

$

—

​

Fair value measurement as of December 31, 2022:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Quoted prices in

​

Significant other

​

Significant

Financial assets

​

​

​

​

active markets for

​

observable

​

unobservable

​

​

​

​

​

identical assets

​

inputs

​

inputs

Type of Instrument

    

Total

    

(Level 1)

    

(Level 2)

    

(Level 3)

Cash and cash equivalents:

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds and checking accounts

​

$

63,741

​

$

63,741

​

$

—

​

$

—

Available-for-sale marketable securities:

​

 

  

​

 

  

​

 

  

​

 

  

U.S. government agency obligations

​

 

8,877

​

 

—

​

 

8,877

​

 

—

Corporate bonds

​

 

35,185

​

 

—

​

 

35,185

​

 

—

Commercial paper

​

 

26,875

​

 

—

​

 

26,875

​

 

—

Municipal bonds

​

​

22,071

​

​

—

​

​

22,071

​

​

—

Restricted cash:

​

 

  

​

 

  

​

 

  

​

 

  

Commercial money market account

​

 

408

​

 

408

​

 

—

​

 

—

Total financial assets

​

$

157,157

​

$

64,149

​

$

93,008

​

$

—