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Fair Value of Financial Instruments
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments

3. Fair Value of Financial Instruments

The Company’s financial instruments consist of cash and cash equivalents, investments and accounts payable and, through May 21, 2018, debt and its related debt conversion feature liability. The carrying amounts reported in the accompanying balance sheets for cash and cash equivalents and accounts payable approximate fair value because of the short-term maturity of those instruments. Further, the Company believed the fair value of the debt approximated its carrying value based upon relatively stable interest rates and the short-term maturity of the instrument.  Fair value measurements are classified and disclosed in one of the following three categories:

Level 1 —Quoted prices in active markets for identical assets or liabilities.

Level 2 —Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 —Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

As of September 30, 2019 and December 31, 2018, all of the Company’s financial assets that were subject to fair value measurements were valued using observable inputs. The Company’s financial assets valued based on Level 1 inputs consist of money market funds and certificates of deposit. The Company’s financial assets valued based on Level 2 inputs consist of corporate debt securities, which consist of investments in highly-rated investment-grade corporations.

The Company’s investment strategy is focused on capital preservation. The Company invests in instruments that meet the credit quality standards outlined in the Company’s investment policy. This policy also limits the amount of credit exposure to any one issue or type of instrument. As of September 30, 2019, the Company’s investments were in government money market funds and corporate debt securities.

The fair values of the Company’s financial instruments are presented below (in thousands):

 

 

 

 

 

 

Fair Value Measurements at September 30, 2019

 

 

 

Total

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

Financial assets carried at fair value:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Government money market funds

 

$

27,527

 

 

$

27,527

 

 

$

 

 

$

 

Corporate debt securities, available-for-sale

 

 

960

 

 

 

 

 

 

960

 

 

 

 

Short-term investments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Corporate debt securities, available-for-sale

 

 

257,120

 

 

 

 

 

 

257,120

 

 

 

 

Total financial assets

 

$

285,607

 

 

$

27,527

 

 

$

258,080

 

 

$

 

 

 

 

 

 

 

 

Fair Value Measurements at December 31, 2018

 

 

 

Total

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

Financial assets carried at fair value:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Government money market funds

 

$

1,724

 

 

$

1,724

 

 

$

 

 

$

 

Corporate debt securities, available-for-sale

 

 

21,976

 

 

 

 

 

 

21,976

 

 

 

 

Short-term investments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper, available for sale

 

 

3,479

 

 

 

 

 

 

3,479

 

 

 

 

Corporate debt securities, available-for-sale

 

 

273,262

 

 

 

 

 

 

273,262

 

 

 

 

Total financial assets

 

$

300,441

 

 

$

1,724

 

 

$

298,717

 

 

$