Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash used in operating activities
Net loss	$ (64,090)	$ (52,398)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	918	974
Amortization of intangible assets	12,548	12,504
Stock-based compensation	1,842	2,493
Non-cash interest expense	19,146	15,805
Provision for inventory excess and obsolescence	0	1,536
Unrealized foreign exchange loss (gain)	1,170	(377)
Amortization of debt issuance costs	127	0
Deferred income taxes	919	(12)
Other non-cash operating activities	9	14
Changes in assets and liabilities:
Accounts receivable	3,790	(4,107)
Inventories	(2,772)	4,925
Prepaid expenses and other assets	(3,628)	(430)
Accounts payable	(3,345)	(8,232)
Accrued liabilities and other liabilities	(831)	608
Net cash used in operating activities	(34,197)	(26,697)
Cash used in investing activities
Purchases of property and equipment	(382)	(560)
Net cash used in investing activities	(382)	(560)
Cash provided by financing activities
Net proceeds from term loan, net of debt discount	19,977	0
Issuance of common shares	412	50
Payment of term loan issuance costs	(698)	0
Net cash provided by financing activities	19,691	50
Exchange rate effect on cash	(566)	1,534
Net decrease in cash and cash equivalents	(15,454)	(25,673)
Cash and cash equivalents, beginning of period	55,430	108,927
Cash and cash equivalents, end of period	39,976	83,254
Supplemental disclosures of cash flow information
Cash paid for interest	3,422	3,250
Cash (received) paid for taxes, net	(71)	986
Non-cash investing activities
Purchases of property and equipment included in accounts payable	$ 35	$ 1