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Cash, Cash Equivalents and Investments (Tables)
 3 Months Ended
Mar. 31, 2017
Cash And Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Short-Term Investments

Cash, cash equivalents and short-term investments consisted of the following (in thousands):

 

 

March 31,

2017

 

 

December 31,

2016

 

Cash

$

8,740

 

 

$

11,016

 

Cash equivalents:

 

 

 

 

 

 

 

Money market funds

 

964

 

 

 

2,796

 

Corporate commercial paper

 

—

 

 

 

500

 

Total cash equivalents

 

964

 

 

 

3,296

 

Total cash and cash equivalents

 

9,704

 

 

 

14,312

 

Short-term investments:

 

 

 

 

 

 

 

Corporate commercial paper

 

10,149

 

 

 

11,465

 

Corporate debt securities

 

11,131

 

 

 

7,423

 

Total short-term investments

 

21,280

 

 

 

18,888

 

Total cash, cash equivalents and short-term investments

$

30,984

 

 

$

33,200