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	$ (41,168)	$ (12,713)
Reconciliation of net loss to net cash (used in) provided by operating activities:
Depreciation of fixed assets and leases	1,972	1,778
Provision for bad debt	236	51
Provision for write down of inventory	1,931	(270)
Stock based compensation	658	684
Amortization of debt costs and debt discount	3,871	3,082
Amortization of intangible assets	1,368	1,514
Non cash lease expense	209	199
Foreign currency exchange loss	(528)	291
Partial extinguishment of Convertible 3.75% Senior Notes	0	185
Loss on impairment of intangible assets	8,373	0
Non cash interest expense	6,171	4,228
Change in the fair value of derivative liabilities	5,849	0
Changes in operating assets and liabilities:
Accounts receivable	6,510	(3,170)
Inventories	(11,130)	(5,537)
Prepaid expenses, other current receivables and assets	294	1,183
Accounts payable and accrued expenses	4,447	(512)
Operating liabilities	(206)	(172)
Deferred income	0	(1,109)
Net cash used in operating activities	(11,143)	(10,288)
Cash flows from investing activities:
Capital expenditures	(2,369)	(5,101)
Net cash used in investing activities	(2,369)	(5,101)
Cash flows from financing activities:
Proceeds from Revolver	0	10,000
Debt issuance costs	0	(109)
Repurchase of 3.75% senior notes	0	(2,686)
Government grant advance	3,378	0
Principal paid on lease obligation	(7)	(6)
Net cash (used in) provided by financing activities	3,371	7,199
Effect of exchange rate on cash and cash equivalents	484	(80)
Net decrease in cash, cash equivalents and restricted cash	(9,657)	(8,270)
Cash, cash equivalents and restricted cash at beginning of period	16,182	13,069
Cash, cash equivalents and restricted cash at end of period	6,525	4,799
Supplemental Cash flow information:
Cash payments for interest	2,352	2,689
Cash payments for income taxes	34	53
Non-cash operating, investing and financing transactions:
Acquisition of capital expenditures in accounts payable and accrued expenses	215	642
Capitalized stock compensation in capital expenditures	$ 9	$ 16