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	$ (28,230)	$ (19,819)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,629	1,416
Provision for doubtful accounts	971	(17)
Provision for inventory obsolescence	564	(22)
Share-based compensation	3,186	3,730
Loss from disposal of property and equipment	114	24
Unrealized foreign currency loss, net	5,647	67
Change in fair value of derivative instruments	437	(2,608)
Change in fair value of contingent consideration	(299)	(362)
Amortization of debt discount	797	1,731
Changes in operating assets and liabilities:
Accounts receivable	4,150	(3,715)
Inventory	(3,235)	(725)
Prepaid expenses and other current assets	2,667	(234)
Other assets	4	(56)
Accounts payable	(1,289)	2,413
Accrued liabilities	(5)	2,709
Other liabilities	(5)	407
Net cash used in operating activities	(12,897)	(15,061)
Cash flows from investing activities:
Purchases of property and equipment	(1,290)	(4,882)
Cash used in asset acquisition	(497)	(767)
Cost incurred for intangible assets	(495)	(17)
Net cash used in investing activities	(2,282)	(5,666)
Cash flows from financing activities:
Repayments on capital leases	(139)	(185)
Proceeds from issuance of ordinary shares, net of issuance costs	63,855	0
Proceeds from stock option exercises	374	176
Proceeds from warrant exercises	0	58
Tax payments related to shares withheld upon vesting of restricted stock	(48)	(91)
Net cash provided by (used in) financing activities	64,042	(42)
Effect of exchange rate changes on cash	(136)	0
Net (decrease)/increase in cash	48,727	(20,769)
Cash at beginning of period	37,655	52,639
Cash at end of period	86,382	31,870
Supplemental disclosures:
Cash paid for interest	3,464	2,724
Cash paid for income taxes	2	146
Supplemental disclosures of non-cash investing and financing activities:
Unpaid balance for property and equipment	327	622
Assets acquired under capital leases	0	69
Equity consideration in an asset acquisition	0	337
Inventory acquired in an asset acquisition	0	1,257
Consideration payable related to asset acquisition	$ 779	$ 1,277