CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (25,124)	$ (36,256)
Reconciliation of net loss to net cash provided by (used in) operating activities:
Depreciation of fixed assets	3,688	2,579
Gain on sale of assets	0	(20)
Provision for write down of inventory	(459)	1,363
Provision for bad debt	(428)	452
Issuance of stock to consultant	0	102
Stock based compensation	1,076	1,970
Amortization of debt costs and debt discount	6,514	9,226
Amortization of intangibles	3,008	3,096
Non cash lease expense	408	0
Deferred income taxes	(22)	73
Foreign currency exchange loss (gain)	1,523	3,371
Partial extinguishment of 3.75% senior notes	185	4,235
Non cash interest expense	8,464	0
Extinguishment of prior term loan	0	1,315
Loss on impairment of intangible assets	0	1,924
Loss on debt restructuring	920	0
Change in the fair value of derivative liability	(6,769)	0
Changes in operating assets and liabilities:
Accounts receivable	(3,655)	(4,047)
Inventories	(6,145)	(1,877)
Prepaid expenses and other current receivables	803	224
Other assets	12	(26)
Operating liabilities	(369)	0
Accounts payable and accrued expenses	377	(3,405)
Deferred income	(2,426)	2,426
Net cash used in operating activities	(18,419)	(13,275)
Cash flows from investing activities:
Capital expenditures	(8,203)	(25,332)
Disposal of fixed assets	0	38
Net cash used in investing activities	(8,203)	(25,294)
Cash flows from financing activities:
Proceeds from 2023 Series B senior notes	17,750	0
Proceeds from 2023 Series B bifurcated conversion option	11,525	0
Proceeds from revolver	12,500	15,000
Repayment of revolver	(2,500)	0
Repayment of prior term loan, net	0	(25,550)
Repayment of 3.75% senior notes	(13,022)	0
Debt issuance costs	(3,107)	(6,239)
Repurchase of 3.75% senior notes	(2,686)	(53,123)
Proceeds from exercise of common stock options and warrants	0	251
Principal payments on capital lease obligations	(11)	(6)
Net cash provided by financing activities	30,449	25,333
Effect of exchange rate on cash, cash equivalents and restricted cash	(714)	(860)
Net increase (decrease) in cash, cash equivalents and restricted cash	3,827	(13,236)
Cash, cash equivalents and restricted cash at beginning of year	13,069	27,165
Cash, cash equivalents and restricted cash at end of year	16,182	13,069
Supplemental Cash flow information:
Cash payments for interest	5,633	7,340
Cash payments for income taxes	150	89
Non cash investing and financing transactions:
Acquisition of capital expenditures in accounts payable and accrued expenses	46	568
Capitalized stock compensation in capital expenditures	28	96
Issuance of stock to consultant	0	102
2021 Term Loan
Cash flows from financing activities:
Proceeds from term loan	0	25,000
2023 Term Loan
Cash flows from financing activities:
Proceeds from term loan	$ 10,000	$ 70,000