CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (41,678)	$ (19,826)
Reconciliation of net loss to net cash (used in) provided by operating activities:
Depreciation of fixed assets and leases	2,933	2,700
Provision for bad debt	214	(97)
Provision for write down of inventory	5,074	(295)
Stock based compensation	795	896
Amortization of debt costs and debt discount	6,254	4,657
Amortization of intangible assets	2,032	2,260
Non cash lease expense	320	308
Deferred income taxes	70	0
Foreign currency exchange (gain)/loss	(2,384)	2,458
Partial extinguishment of Convertible 3.75% Senior Notes	0	185
Write down of fixed assets	398	0
Loss on impairment of intangible assets	8,373	0
Non cash interest expense	12,985	6,359
Gain on debt restructuring	(10,882)	0
Inducement loss	701	0
Change in the fair value of derivative liabilities	1,523	0
Changes in operating assets and liabilities:
Accounts receivable	3,764	(4,018)
Inventories	(8,906)	(5,970)
Prepaid expenses, other current receivables, and assets	1,581	1,666
Accounts payable and accrued expenses	1,540	2,747
Operating liabilities	(314)	(265)
Deferred income	0	(2,426)
Net cash used in operating activities	(15,607)	(8,661)
Cash flows from investing activities:
Capital expenditures	(3,164)	(6,082)
Net cash used in investing activities	(3,164)	(6,082)
Cash flows from financing activities:
Proceeds from exercise of common stock options	0	0
Proceeds from Revolver	0	12,500
Proceeds from 2023 Series C Senior Notes	12,000	0
Debt issuance costs	(2,776)	(269)
Repurchase of 3.75% senior notes	0	(2,686)
Government grant advance	3,378	0
Principal paid on lease obligation	(10)	(9)
Net cash provided by financing activities	12,592	9,536
Effect of exchange rate on cash and cash equivalents	369	(481)
Net decrease in cash, cash equivalents and restricted cash	(5,810)	(5,207)
Cash, cash equivalents and restricted cash at beginning of period	16,182	13,069
Cash, cash equivalents and restricted cash at end of period	10,372	7,381
Supplemental Cash flow information:
Cash payments for interest	2,795	3,211
Cash payments for income taxes	64	68
Non-cash operating, investing and financing transactions:
Acquisition of capital expenditures in accounts payable and accrued expenses	220	938
Capitalized stock compensation in capital expenditures	$ 12	$ 23