CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net loss	$ (18,285)	$ (17,383)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	4,380	4,037
Write-off and amortization of debt issuance costs	837	783
Share-based compensation expense	748	623
(Gain) loss on disposal of property and equipment	(2)	1
Gain on extinguishment of convertible senior notes		(60)
Deferred income taxes		(94)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	75,108	77,916
Inventory	7,969	7,074
Income taxes receivable	(541)
Prepaid expenses and other assets	(15,056)	(868)
Accounts payable	(19,258)	(8,756)
Accrued expenses	(20,001)	(26,556)
Reserve for sales returns and allowances	(5,873)	(4,163)
Income taxes payable		674
Other liabilities	(95)	148
Total adjustments	28,216	50,759
Net cash provided by operating activities	9,931	33,376
Cash flows from investing activities
Purchases of property and equipment	(4,367)	(3,816)
Net cash used in investing activities	(4,367)	(3,816)
Cash flows from financing activities
Repurchase of common stock		(9,841)
Repurchase of common stock for employee tax withholding	(12)	(844)
Restricted cash	(10,576)
Repurchase of convertible senior notes	(24,052)	(1,940)
Net cash used in financing activities	(34,640)	(12,625)
Net increase (decrease) in cash and cash equivalents	(29,076)	16,935
Effect of foreign currency translation	468	(549)
Cash and equivalents, beginning of period	86,064	102,528
Cash and equivalents, end of period	57,456	118,914
Cash paid during the period for:
Income taxes	221	311
Interest	$ 2,039	$ 2,139