CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (11,998)	$ (29,127)
Adjustments to reconcile net loss to net cash (used in) operating activities:
Provision for doubtful accounts	(225)	(93)
Depreciation and amortization	1,882	3,234
Payment-in-kind interest	1,155	0
Amortization of debt discount	693	0
Write-off and amortization of debt issuance costs	351	606
Share-based compensation expense	252	618
Gain on disposal of property and equipment	0	(62)
Change in fair value of convertible senior notes	(7,675)	2,423
Change in fair value of preferred stock derivative liability	(2,082)	0
Changes in operating assets and liabilities:
Accounts receivable	53,406	54,578
Inventory	6,026	9,195
Prepaid expenses and other assets	4,242	(11,592)
Accounts payable	(38,452)	(28,436)
Accrued expenses	(17,459)	69
Reserve for sales returns and allowances	(6,622)	(3,394)
Income taxes payable	(2,239)	3
Other liabilities	(122)	83
Total adjustments	(6,869)	27,232
Net cash used in operating activities	(18,867)	(1,895)
Cash flows from investing activities
Purchases of property and equipment	(1,585)	(2,459)
Net cash used in investing activities	(1,585)	(2,459)
Cash flows from financing activities
Repayment of credit facility borrowings	0	(7,500)
Repurchase of common stock for employee tax withholding	(172)	(249)
Net cash used in financing activities	(172)	(7,749)
Net decrease in cash, cash equivalents and restricted cash	(20,624)	(12,103)
Effect of foreign currency translation	(1,634)	1,303
Cash, cash equivalents and restricted cash, beginning of period	66,286	58,205
Cash, cash equivalents and restricted cash, end of period	44,028	47,405
Cash paid during the period for:
Income taxes	2,567	(61)
Interest	$ 5,642	$ 838