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Fair Value of Financial Instruments
12 Months Ended
Dec. 31, 2017
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 available for sale securities within Level 1 or Level 2. This is because the Company values its cash equivalents and available for sale 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 December 31, 2017 and December 31, 2016 are summarized below:

 

 

 

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

 

 

 

 

 

Fair Value Measurements Using

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

 

 

(in thousands)

 

December 31, 2016

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents

 

$

187,335

 

 

$

 

 

$

 

 

$

187,335

 

Certificates of deposit

 

 

 

 

 

12,698

 

 

 

 

 

 

12,698

 

U.S. government debt securities

 

 

 

 

 

50,920

 

 

 

 

 

 

50,920

 

Corporate debt securities

 

 

 

 

 

9,390

 

 

 

 

 

 

9,390

 

 

 

$

187,335

 

 

$

73,008

 

 

$

 

 

$

260,343

 

 

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 December 31, 2017 and December 31, 2016.

Investment securities are exposed to various risks such as interest rate, market and credit. 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.