Cash and cash equivalents and marketable securities (Tables)

12 Months Ended

Dec. 31, 2015

Cash and cash equivalents

Cash and cash equivalents, and marketable securities

	December 31,
	2015		2014
Cash and cash equivalents:
Cash	$	12,488	$	3,247
Money market accounts		2,230		5,602
Total cash and cash equivalents	$	14,718	$	8,849
Short-term marketable securities:
Marketable securities	$	—	$	1,614
Total short-term marketable securities	$	—	$	1,614