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Cash Equivalents and Short-Term Investments (Tables)
6 Months Ended
Jun. 30, 2017
Cash And Cash Equivalents [Abstract]  
Summary of Available-for-Sale Securities

The following is a summary of the Company’s available-for-sale securities as of June 30, 2017 (in thousands):  

 

 

 

June 30, 2017

 

 

 

Amortized

Cost Basis

 

 

Unrealized

Gains

 

 

Unrealized

Loses

 

 

Estimated

Fair Value

 

Money market funds

 

$

3,003

 

 

$

 

 

$

 

 

$

3,003

 

Certificates of deposit

 

 

11,967

 

 

 

 

 

 

 

 

 

11,967

 

Commercial paper

 

 

50,947

 

 

 

 

 

 

 

 

 

50,947

 

U.S. government agency

 

 

63,262

 

 

 

1

 

 

 

(76

)

 

 

63,187

 

Corporate bonds

 

 

66,142

 

 

 

 

 

 

(62

)

 

 

66,080

 

Total cash equivalents and

   short-term investments

 

 

195,321

 

 

 

1

 

 

 

(138

)

 

 

195,184

 

Less: cash equivalents

 

 

(37,289

)

 

 

 

 

 

 

 

 

(37,289

)

Total short-term investments

 

$

158,032

 

 

$

1

 

 

$

(138

)

 

$

157,895

 

 

Summary of Cost and Estimated Fair Value of Available-for-Sale Securities Based on Stated Effective Maturities

The following table is a summary of the cost and estimated fair value of the Company’s available-for-sale securities based on stated effective maturities as of June 30, 2017 (in thousands):

 

 

 

June 30, 2017

 

 

 

Amortized

Cost Basis

 

 

Estimated Fair Value

 

Mature within one year

 

$

160,946

 

 

$

160,870

 

Mature after one year to three years

 

 

34,375

 

 

 

34,314

 

Total cash equivalents and short-term

   investments

 

$

195,321

 

 

$

195,184