Cash and cash equivalents

12 Months Ended

Dec. 31, 2018

Cash and cash equivalents

Cash and cash equivalents

4. Cash and cash equivalents

Cash and cash equivalents consisted of the following:                                                                            

	December 31,
	2018		2017
Cash and cash equivalents:
Cash	$	11,689	$	24,430
Money market accounts		137,723		2,255
Total cash and cash equivalents	$	149,412	$	26,685

For the years ended December 31, 2018, 2017 and 2016, interest income was $742,  $17 and $8, respectively, which is included in interest and other expense, net in the accompanying consolidated statements of operations.