CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (12,713)	$ (17,921)
Reconciliation of net loss to net cash (used in) provided by operating activities:
Depreciation of fixed assets and leases	1,778	1,133
Provision for bad debt	51	811
Provision for write down of inventory	(270)	1,154
Stock based compensation	684	1,103
Amortization of debt costs and debt discount	3,082	4,927
Amortization of intangible assets	1,514	1,550
Non cash lease expense	199	0
Foreign currency exchange loss	291	1,895
Partial extinguishment of Convertible 3.75% Senior Notes	185	2,467
Loss on impairment of intangible assets	0	22
Non cash interest expense	4,228	0
Changes in operating assets and liabilities:
Accounts receivable	(3,170)	(4,227)
Inventories	(5,537)	(2,816)
Prepaid expenses, other current receivables and assets	1,183	1,478
Accounts payable and accrued expenses	(512)	(4,086)
Operating liabilities	(172)	0
Deferred income	(1,109)	0
Net cash used in operating activities	(10,288)	(12,510)
Cash flows from investing activities:
Capital expenditures	(5,101)	(12,523)
Net cash used in investing activities	(5,101)	(12,523)
Cash flows from financing activities:
Proceeds from exercise of common stock options	0	12
Proceeds from Revolver	10,000	0
Proceeds from 2021 Term Loan	0	15,000
Debt issuance costs	(109)	(2,457)
Repurchase of 3.75% senior notes	(2,686)	0
Principal paid on lease obligation	(6)	0
Net cash provided by financing activities	7,199	12,555
Effect of exchange rate on cash and cash equivalents	(80)	(540)
Net decrease in cash, cash equivalents and restricted cash	(8,190)	(12,478)
Cash, cash equivalents and restricted cash at beginning of period	13,069	27,165
Cash, cash equivalents and restricted cash at end of period	4,799	14,147
Supplemental Cash flow information:
Cash payments for interest	2,689	2,475
Cash payments for income taxes	53	48
Non-cash operating, investing and financing transactions:
Acquisition of capital expenditures in accounts payable and accrued expenses	642	3,042
Capitalized interest in capital expenditures	0	477
Capitalized stock compensation in capital expenditures	$ 16	$ 63