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	$ (44,208)	$ (49,162)
Adjustments to reconcile net loss to net cash used in operating activities:
Deferred income taxes	0	(3,380)
Bad debt expense	1,942	605
Depreciation and amortization	2,870	3,475
Stock-based compensation	2,656	4,884
Change in fair value of derivative liabilities	(12,505)	1,151
Change in fair value of contingent consideration related to acquisition	(200)	100
Accretion of interest and amortization of deferred financing costs	10,199	7,239
Payable in kind interest expense on term loan facility	6,331	3,883
Non-cash foreign exchange loss	1,214	122
Loss on debt extinguishment	730	11,756
Non-cash lease expense	107	113
Changes in operating assets and liabilities:
Accounts receivable and other receivables	9,321	(1,851)
Inventories	339	(463)
Prepaid expenses and other current assets	(2,231)	587
Accounts payable	(5,079)	1,666
Accrued payroll	(5,224)	(781)
Accrued expenses and other liabilities	2,416	(394)
Net cash used in operating activities	(31,322)	(20,450)
Cash flows from investing activities:
Purchases of property and equipment	(103)	(229)
Net cash used in investing activities	(103)	(229)
Cash flows from financing activities:
Deferred financing costs	(1,379)	(3,977)
Proceeds from PPP loan	9,813	0
Proceeds from sale of common stock under employee stock purchase plan	49	209
Minimum tax withholding paid on behalf of employees for stock-based compensation	(43)	(94)
Proceeds from common stock offering and pre-paid warrants, net of expenses paid	0	51,985
Net cash provided by financing activities	8,440	48,123
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(79)	(32)
Net increase (decrease) in cash, cash equivalents and restricted cash	(23,064)	27,412
Cash, cash equivalents and restricted cash, beginning of period	42,760	24,731
Total cash, cash equivalents and restricted cash, end of period	19,696	52,143
Supplemental disclosure of cash flow information:
Cash paid for interest	2,678	4,398
Cash paid for income taxes	116	179
Cash paid for amounts included in the measurement of operating lease liabilities	1,580	1,701
Non-cash investing and financing activities:
Acquisition of property and equipment included in accounts payable	0	77
Fair value of embedded derivative issued in connection with loan agreements (Note 7)	12,016	22,808
Conversion of debt to equity	0	1,860
Fair value of common and preferred stock issued in connection with loan agreements	$ 2,000	$ 0