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Available-for-Sale Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2022
Investments Debt And Equity Securities [Abstract]  
Summary of Available-for-Sale Marketable Securities by Major Type of Security

As of June 30, 2022

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Gross Unrealized

​

Estimated Fair

Type of Security

    

Amortized Cost

    

Gains

    

Losses

    

Value

U.S. Treasury securities

​

$

11,033

​

$

—

​

$

(32)

​

$

11,001

U.S. government agency obligations

​

 

9,500

​

 

—

​

 

(456)

​

 

9,044

Corporate bonds

​

 

59,053

​

 

—

​

 

(853)

​

 

58,200

Commercial paper

​

​

57,846

​

​

—

​

​

(150)

​

​

57,696

Municipal bonds

​

 

22,580

​

 

—

​

 

(556)

​

 

22,024

Total available-for-sale marketable securities

​

$

160,012

​

$

—

​

$

(2,047)

​

$

157,965

​

As of December 31, 2021

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Gross Unrealized

​

Estimated Fair

Type of Security

    

Amortized Cost

    

Gains

    

Losses

    

Value

U.S. Treasury securities

​

$

11,573

​

$

—

​

$

(3)

​

$

11,570

U.S. government agency obligations

​

 

17,020

​

 

—

​

 

(45)

​

 

16,975

Corporate bonds

​

 

66,495

​

 

—

​

 

(171)

​

 

66,324

Commercial paper

​

 

106,914

​

 

5

​

 

(31)

​

 

106,888

Municipal bonds

​

​

21,692

​

​

—

​

​

(113)

​

​

21,579

Total available-for-sale marketable securities

​

$

223,694

​

$

5

​

$

(363)

​

$

223,336

Schedule of Fair Values and Continuous Unrealized Loss Positions of Available-for-Sale Marketable Securities

As of June 30, 2022

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Less than 12 Months

​

12 Months or Greater

​

Total

​

​

​

​

​

Gross

​

​

​

​

Gross

​

​

​

​

Gross

​

​

Fair

​

Unrealized

​

Fair

​

Unrealized

​

Fair 

​

Unrealized

​

    

 Value

    

Losses

    

Value

    

Losses

    

Value

    

Losses

U.S. Treasury securities

​

$

11,001

​

$

(32)

​

$

—

​

$

—

​

$

11,001

​

$

(32)

U.S. government agency obligations

​

 

7,123

​

 

(377)

​

 

1,921

​

 

(79)

​

 

9,044

​

 

(456)

Corporate bonds

​

​

53,797

​

​

(749)

​

​

4,403

​

​

(104)

​

​

58,200

​

​

(853)

Commercial paper

​

​

57,696

​

​

(150)

​

​

—

​

​

—

​

​

57,696

​

​

(150)

Municipal bonds

​

 

18,019

​

 

(439)

​

 

4,005

​

 

(117)

​

 

22,024

​

 

(556)

Total

​

$

147,636

​

$

(1,747)

​

$

10,329

​

$

(300)

​

$

157,965

​

$

(2,047)

​

As of December 31, 2021

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Less than 12 Months

​

12 Months or Greater

​

Total

​

​

​

​

​

Gross

​

​

​

​

Gross

​

​

​

​

Gross

​

​

Fair

​

Unrealized

​

Fair

​

Unrealized

​

Fair

​

Unrealized

​

    

 Value

    

Losses

    

 Value

    

Losses

    

 Value

    

Losses

U.S. Treasury securities

​

$

11,570

​

$

(3)

​

$

—

​

$

—

​

$

11,570

​

$

(3)

U.S. government agency obligations

​

​

9,456

​

​

(45)

​

​

—

​

​

—

​

​

9,456

​

​

(45)

Corporate bonds

​

 

62,704

​

 

(170)

​

 

2,020

​

 

(1)

​

 

64,724

​

 

(171)

Commercial paper

​

 

52,163

​

 

(31)

​

 

—

​

 

—

​

 

52,163

​

 

(31)

Municipal bonds

​

 

20,562

​

 

(105)

​

 

1,017

​

 

(8)

​

 

21,579

​

 

(113)

Total

​

$

156,455

​

$

(354)

​

$

3,037

​

$

(9)

​

$

159,492

​

$

(363)

Schedule of Amortized Cost and Fair Values of Marketable Debt Securities by Contractual Maturity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

As of June 30, 2022

​

As of December 31, 2021

Contractual maturity

    

Amortized Cost

    

Fair Value

    

Amortized Cost

    

Fair Value

Less than one year

​

$

111,417

​

$

110,794

​

$

153,631

​

$

153,582

One year to three years

​

 

48,595

​

 

47,171

​

 

70,063

​

 

69,754

Total

​

$

160,012

​

$

157,965

​

$

223,694

​

$

223,336