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	$ (17,759)	$ (10,779)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	833	633
Provision for doubtful accounts	599	112
Provision for inventory obsolescence	137	(83)
Share-based compensation	1,629	1,836
Loss from disposal of property and equipment	5	8
Unrealized foreign currency loss, net	5,845	892
Change in fair value of derivative instruments	1,929	32
Change in fair value of contingent consideration	(440)	(225)
Amortization of debt discount	388	868
Changes in operating assets and liabilities:
Accounts receivable	(171)	(2,883)
Inventory	438	1,744
Prepaid expenses and other current assets	(660)	(826)
Other assets	0	(11)
Accounts payable	366	(619)
Accrued liabilities	40	1,142
Other liabilities	19	161
Net cash used in operating activities	(6,802)	(7,998)
Cash flows from investing activities:
Purchases of property and equipment	(687)	(685)
Cash used in asset acquisition	0	(767)
Cost incurred for intangible assets	(262)	(3)
Net cash used in investing activities	(949)	(1,455)
Cash flows from financing activities:
Repayments on capital leases	(76)	(102)
Proceeds from stock option exercises	181	84
Proceeds from warrant exercises	0	58
Tax payments related to shares withheld upon vesting of restricted stock	(34)	(56)
Net cash provided by (used in) financing activities	63,926	(16)
Effect of exchange rate changes on cash	(234)	(35)
Net (decrease)/increase in cash	55,941	(9,504)
Cash at beginning of period	37,655	52,639
Cash at end of period	93,596	43,135
Supplemental disclosures:
Cash paid for interest	1,734	1,402
Cash paid for income taxes	1	87
Supplemental disclosures of non-cash investing and financing activities:
Unpaid balance for property and equipment	395	705
Assets acquired under capital leases	0	69
Equity consideration in an asset acquisition	0	337
Inventory acquired in an asset acquisition	0	1,104
Consideration payable related to asset acquisition	1,257	1,257
Common Shares
Cash flows from financing activities:
Proceeds from issuance of ordinary shares, net of issuance costs	$ 63,855	$ 0