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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  
Schedule of financial assets measured at fair value on a recurring basis by level within the fair value hierarchy

The following tables summarize the Company’s financial assets measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

As of September 30, 2022

​

​

Fair Value 

​

Amortized

​

Unrealized

​

Unrealized

​

Fair Market

​

    

Hierarchy

    

 Cost Basis

    

 Gains

    

 Losses

    

 Value

Cash equivalents:

 

  

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds

 

Level 1

​

$

109,647

​

$

—

​

$

—

​

$

109,647

Marketable securities, available for sale:

 

  

​

 

​

​

 

  

​

 

  

​

 

  

Asset-backed securities

 

Level 2

​

 

12,778

​

 

—

​

 

(65)

​

 

12,713

Corporate debt securities

 

Level 2

​

 

66,233

​

 

—

​

 

(898)

​

 

65,335

Commercial paper

 

Level 2

​

 

79,191

​

 

—

​

 

—

​

 

79,191

U.S. government treasury and agency securities

​

Level 2

​

 

54,228

​

 

—

​

 

(933)

​

 

53,295

Supranational and sovereign government securities

​

Level 2

​

 

44,824

​

 

10

​

 

(293)

​

 

44,541

Total financial assets

 

  

​

$

366,901

​

$

10

​

$

(2,189)

​

$

364,722

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

As of December 31, 2021

​

​

Fair Value

​

Amortized

​

Unrealized

​

Unrealized

​

Fair Market

​

​

Hierarchy

    

 Cost Basis

    

 Gains

    

 Losses

    

 Value

Cash equivalents:

 

  

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds

 

Level 1

​

$

15,466

​

$

—

​

$

—

​

$

15,466

Marketable securities, available for sale:

 

  

​

 

  

​

 

  

​

 

  

​

 

  

Asset-backed securities

 

Level 2

​

 

36,681

​

 

—

​

 

(42)

​

 

36,639

Corporate debt securities

 

Level 2

​

 

88,084

​

 

—

​

 

(160)

​

 

87,924

Commercial paper

​

Level 2

​

​

58,970

​

​

—

​

​

—

​

​

58,970

U.S. government treasury and agency securities

​

Level 2

​

​

59,596

​

​

—

​

​

(222)

​

​

59,374

Supranational and sovereign government securities

 

Level 2

​

 

22,406

​

 

—

​

 

(90)

​

 

22,316

Total financial assets

 

  

​

$

281,203

​

$

—

​

$

(514)

​

$

280,689