Cash and cash equivalents and marketable securities

9 Months Ended

Sep. 30, 2019

Cash and cash equivalents and marketable securities

Cash and cash equivalents and marketable securities

4. Cash and cash equivalents and marketable securities

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

	September 30,		December 31,
	2019		2018
Cash and cash equivalents:
Cash	$	4,391	$	11,689
Money market accounts		45,791		137,723
Total cash and cash equivalents	$	50,182	$	149,412
Short-term marketable securities-available-for-sale:
Marketable securities	$	36,594	$	—
Total short-term marketable securities	$	36,594	$	—

All contractual maturities of marketable securities were less than one year at September 30, 2019. 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 three and nine months ended September 30, 2019, interest income was $431 and $1,685, respectively. For the three and nine months ended September 30, 2018, interest income was $12 and $31, respectively. Interest income is included in interest income and other expense, net in the accompanying condensed consolidated statements of operations.