Cash and cash equivalents (Tables)

6 Months Ended

Jun. 30, 2013

Cash and cash equivalents

Schedule of cash and cash equivalents

	June 30, 2013		December 31, 2012
Cash and cash equivalents:
Cash	$	6,927	$	16,677
Money market accounts	41,165		39,001
Marketable securities	—		2,460
Total cash and cash equivalents	$	48,092	$	58,138