Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Revenue, net
Direct	$ 36,250		$ 33,936		$ 78,192		$ 74,833
Fulfillment partner	256,954		205,600		527,006		427,070
Total net revenue	293,204		239,536		605,198		501,903
Cost of goods sold
Direct	31,842	[1]	31,108	[1]	68,991	[1]	68,738	[1]
Fulfillment partner	203,523		165,259		419,432		342,488
Total cost of goods sold	235,365		196,367		488,423		411,226
Gross profit	57,839		43,169		116,775		90,677
Operating expenses:
Sales and marketing	19,208	[1]	13,512	[1]	37,913	[1]	27,987	[1]
Technology	17,920	[1]	15,122	[1]	36,080	[1]	30,760	[1]
General and administrative	16,585	[1]	14,516	[1]	31,673	[1]	29,338	[1]
Restructuring	(39)				(471)		98
Total operating expenses	53,674		43,150		105,195		88,183
Operating income	4,165		19		11,580		2,494
Interest income	32		27		66		56
Interest expense	(37)		(253)		(88)		(461)
Other income (expense), net	(150)		719		195		1,151
Income before income taxes	4,010		512		11,753		3,240
Provision for income taxes	312		42		358		51
Net income	3,698		470		11,395		3,189
Net income per common share-basic:
Net income attributable to common shares-basic (in dollars per share)	$ 0.16		$ 0.02		$ 0.48		$ 0.14
Weighted average common shares outstanding-basic (in shares)	23,714		23,437		23,654		23,382
Net income per common share-diluted:
Net income attributable to common shares-diluted (in dollars per share)	$ 0.15		$ 0.02		$ 0.47		$ 0.14
Weighted average common shares outstanding-diluted (in shares)	24,283		23,464		24,158		23,399
Comprehensive income	$ 3,698		$ 470		$ 11,395		$ 3,189

[1] (1) Includes stock-based compensation as follows (Note 7):