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Fair Value (Tables)
 6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Fair Value Assets Measured on a Recurring Basis

The following fair value hierarchy table presents the Company’s assets measured at fair value on a recurring basis (in thousands):

 

 

Fair Value Measurement at Reporting Date Using

 

 

Total

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

June 30, 2018:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assets

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

$

15,845

 

 

$

15,845

 

 

$

—

 

 

$

—

 

U.S. Treasury securities

 

61,020

 

 

 

61,020

 

 

 

—

 

 

 

—

 

U.S. government sponsored enterprise securities

 

19,964

 

 

 

—

 

 

 

19,964

 

 

 

—

 

 

$

96,829

 

 

$

76,865

 

 

$

19,964

 

 

$

—

 

December 31, 2017:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assets

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

$

10,494

 

 

$

10,494

 

 

$

—

 

 

$

—

 

U.S. Treasury securities

 

39,165

 

 

 

39,165

 

 

 

—

 

 

 

—

 

U.S. government sponsored enterprise securities

 

62,383

 

 

 

—

 

 

 

62,383

 

 

 

—

 

 

$

112,042

 

 

$

49,659

 

 

$

62,383

 

 

$

—