Summary of significant accounting policies (Tables)

9 Months Ended

Sep. 30, 2013

Summary of significant accounting policies

Summary of the entity's revenue by primary revenue source

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue:
Retail subscription	$	8,860	$	8,621	$	25,658	$	24,484
Retail single-use	2,386		3,304		7,802		10,799
Wholesale	14,328		11,631		38,222		34,837
Advertising and other	3,033		2,461		6,298		4,386
Total revenue	$	28,607	$	26,017	$	77,980	$	74,506