CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net loss	$ (35,266)	$ (51,612)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for doubtful accounts	423	(248)
Depreciation and amortization	4,461	7,473
Payment-in-kind interest	2,277	0
Amortization of debt discount	1,388	0
Write-off and amortization of debt issuance costs	702	803
Share-based compensation expense	966	1,015
Gain on disposal of property and equipment	(115)	(61)
Change in fair value of convertible senior notes	52	2,529
Change in fair value of preferred stock derivative liability	(2,083)	0
Changes in operating assets and liabilities:
Accounts receivable	48,516	37,407
Inventory	(3,422)	359
Prepaid expenses and other assets	2,142	(12,079)
Accounts payable	(9,239)	6,785
Accrued expenses	(14,323)	3,714
Reserve for sales returns and allowances	(6,053)	(4,905)
Income taxes payable	(2,064)	13
Other liabilities	(264)	(58)
Total adjustments	23,364	42,747
Net cash used in operating activities	(11,902)	(8,865)
Cash flows from investing activities
Purchases of property and equipment	(4,335)	(5,205)
Proceeds from sale of property and equipment	65	0
Net cash used in investing activities	(4,270)	(5,205)
Cash flows from financing activities
Retirement of convertible senior notes	(1,905)	0
Repayment of credit facility borrowings	0	(7,500)
Proceeds from loan under the Paycheck Protection Program	6,206	0
Repayment of term loan	0	(167)
Repurchase of common stock for employee tax withholding	(174)	(273)
Net cash provided by (used in) financing activities	4,127	(7,940)
Net decrease in cash, cash equivalents and restricted cash	(12,045)	(22,010)
Effect of foreign currency translation	(1,553)	853
Cash, cash equivalents and restricted cash, beginning of period	66,286	58,205
Cash, cash equivalents and restricted cash, end of period	52,688	37,048
Cash paid during the period for:
Income taxes	2,791	68
Interest	$ 6,720	$ 5,063