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Cash, Cash Equivalents and Short-Term Investments (Tables)
6 Months Ended
Jun. 30, 2020
Cash, Cash Equivalents and Short-Term Investments  
Schedule of Securities Classified as Cash, Cash Equivalents and Short-Term Investments

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June 30, 2020

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​

​

​

Gross Unrealized

​

​

​

​

    

Amortized Cost

    

Gains

    

Losses

    

Fair Value

Cash and cash equivalents:

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds

​

$

99,410

​

$

—

​

$

—

​

$

99,410

Cash

​

​

1,084

​

​

—

​

​

—

​

​

1,084

Total cash and cash equivalents

​

​

100,494

​

​

—

​

​

—

​

​

100,494

Short-term investments

​

 

  

​

 

  

​

 

​

​

 

  

Commercial paper

​

$

46,328

​

$

115

​

$

—

​

$

46,443

Corporate bonds

​

​

35,119

​

​

170

​

​

—

​

​

35,289

Asset-backed securities

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10,507

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25

​

 

—

​

 

10,532

U.S. government-sponsored agency bonds

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​

8,077

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​

—

​

​

(2)

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​

8,075

U.S. treasury notes

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3,999

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9

​

 

—

​

 

4,008

Total short-term investments

​

​

104,030

​

​

319

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​

(2)

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​

104,347

Total cash equivalents and short-term investments

​

$

204,524

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$

319

​

$

(2)

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$

204,841

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​

​

​

​

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​

​

​

​

​

​

​

​

​

​

December 31, 2019

​

​

​

​

Gross Unrealized

​

​

​

​

    

Amortized Cost

    

Gains

    

Losses

    

Fair Value

Cash and cash equivalents:

 

​

  

 

​

  

 

​

  

 

​

  

Money market funds

​

$

147,208

​

$

—

​

$

—

​

$

147,208

Commercial paper

​

 

19,357

​

 

3

​

 

—

​

 

19,360

Corporate bonds

​

 

11,441

​

 

—

​

 

—

​

 

11,441

Cash

​

 

3,124

​

 

—

​

 

—

​

 

3,124

Total cash and cash equivalents

​

​

181,130

​

​

3

​

​

—

​

​

181,133

Short-term investments

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​

 

  

​

 

​

​

 

  

Commercial paper

​

$

36,667

​

$

14

​

$

—

​

$

36,681

Corporate bonds

​

 

21,690

​

 

6

​

 

(3)

​

 

21,693

Asset-backed securities

​

 

8,005

​

 

—

​

 

—

​

 

8,005

Total short-term investments

​

​

66,362

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​

20

​

​

(3)

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​

66,379

Total cash equivalents and short-term investments

​

$

247,492

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$

23

​

$

(3)

​

$

247,512