v3.20.4
Cash and cash equivalents and marketable securities
12 Months Ended
Dec. 31, 2020
Cash and cash equivalents and marketable securities  
Cash and cash equivalents and marketable securities

5. Cash and cash equivalents and marketable securities

Cash and cash equivalents and marketable securities consisted of the following:

December 31, 

    

2020

    

2019

Cash and cash equivalents:

Cash

$

15,286

$

6,061

Money market funds

 

20,825

 

34,340

Total cash and cash equivalents

$

36,111

$

40,401

Short-term marketable securities-available-for-sale:

Marketable securities

$

4,565

$

40,214

Total short-term marketable securities

$

4,565

$

40,214

All contractual maturities of marketable securities were less than one year at December 31, 2020. Marketable securities consist primarily of debt securities which include commercial paper and debt instruments including notes issued by foreign or domestic industrial and financial corporations and governments which pay in U.S. dollars and carry a rating of A or better. For the years ended December 31, 2020, 2019 and 2018, interest income was $588, $2,012 and $742, respectively, which is included in interest income and other expense, net in the accompanying consolidated statements of operations.