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Fair Value of Financial Instruments
6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments

5. Fair Value of Financial Instruments

The Company utilizes a portfolio management company for the valuation of the majority of its investments. This company is an independent, third-party vendor recognized to be an industry leader with access to market information that obtains or computes fair market values from quoted market prices, pricing for similar securities, recently executed transactions, cash flow models with yield curves and other pricing models. For valuations obtained from the pricing service, the Company performs due diligence to understand how the valuation was calculated or derived, focusing on the valuation technique used and the nature of the inputs.

Based on the fair value hierarchy, the Company classifies its cash equivalents and marketable securities within Level 1 or Level 2. This is because the Company values its cash equivalents and marketable securities using quoted market prices or alternative pricing sources and models utilizing market observable inputs.

Assets measured or disclosed at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 are summarized below:

 

 

 

Fair Value Measurements Using

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

 

 

(in thousands)

 

June 30, 2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents

 

$

163,526

 

 

$

 

 

$

 

 

$

163,526

 

Certificates of deposit

 

 

 

 

 

4,610

 

 

 

 

 

 

4,610

 

U.S. government debt securities

 

 

 

 

 

189,707

 

 

 

 

 

 

189,707

 

Corporate debt securities

 

 

 

 

 

44,280

 

 

 

 

 

 

44,280

 

 

 

$

163,526

 

 

$

238,597

 

 

$

 

 

$

402,123

 

 

 

 

Fair Value Measurements Using

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

 

 

(in thousands)

 

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents

 

$

70,156

 

 

$

 

 

$

 

 

$

70,156

 

Certificates of deposit

 

 

 

 

 

14,117

 

 

 

 

 

 

14,117

 

U.S. government debt securities

 

 

 

 

 

174,803

 

 

 

 

 

 

174,803

 

Corporate debt securities

 

 

 

 

 

58,716

 

 

 

 

 

 

58,716

 

 

 

$

70,156

 

 

$

247,636

 

 

$

 

 

$

317,792

 

 

The Company’s corporate debt securities are all investment grade.

 

The Company had no assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) at June 30, 2018 and December 31, 2017.

Investment securities are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in risks in the near term would result in material changes in the fair value of investments.