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Fair Value of Financial Assets and Liabilities
6 Months Ended
Jun. 30, 2019
Fair Value of Financial Assets and Liabilities  
Fair Value of Financial Assets and Liabilities

3. Fair Value of Financial Assets and Liabilities

The following tables summarize the assets and liabilities measured at fair value on a recurring basis at June 30, 2019 and December 31, 2018 (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fair Value Measurements at June 30, 2019

 

    

Total

    

Level 1

    

Level 2

    

Level 3

Assets:

 

 

  

 

 

  

 

 

  

 

 

  

Money market funds, included in cash and cash equivalents

 

$

71,581

 

$

71,581

 

$

 —

 

$

 —

Marketable securities:

 

 

  

 

 

  

 

 

  

 

 

  

U.S. Treasury obligations

 

 

71,333

 

 

71,333

 

 

 —

 

 

 —

Total assets

 

$

142,914

 

$

142,914

 

$

 —

 

$

 —

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fair Value Measurements at December 31, 2018

 

    

Total

    

Level 1

    

Level 2

    

Level 3

Assets:

 

 

  

 

 

  

 

 

  

 

 

  

Money market funds, included in cash and cash equivalents

 

$

114,593

 

$

114,593

 

$

 —

 

$

 —

Marketable securities:

 

 

  

 

 

  

 

 

  

 

 

  

U.S. Treasury obligations

 

 

60,576

 

 

60,576

 

 

 —

 

 

 —

Total assets

 

$

175,169

 

$

175,169

 

$

 —

 

$

 —

 

Cash and cash equivalents and marketable securities include investments in money market funds that invest in U.S. government securities that are valued using quoted market prices. Accordingly, money market funds and government funds are categorized as Level 1 as of June 30, 2019 and December 31, 2018. There were no transfers between fair value measurements levels during the three or six months ended June 30, 2019 or 2018.

The carrying amounts reflected in the balance sheets for prepaid expenses and other current assets, accounts payable, and accrued expenses approximate their fair values at June 30, 2019 and December 31, 2018, due to their short-term nature.

Upon the completion of the IPO, the Company’s outstanding warrant to purchase preferred stock converted into a warrant to purchase common stock and the Company reclassified the fair value of the warrant to additional paid-in capital. As of June 30, 2019, the warrant is currently exercisable for 7,614 shares of the Company’s common stock at an exercise price of $3.94 per share.