CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net (loss) income	$ (4,802)	$ 831
Reconciliation of net loss to net cash (used in) provided by operating activities
Depreciation and amortization of fixed assets	561	395
Provision for write down of inventory	602	268
Stock based compensation	616	843
Amortization of debt issuance costs	255	224
Amortization of intangibles	791	687
Foreign currency exchange gain	(1,325)	(1,079)
Amortization of debt discount on convertible 3.75% senior notes	2,339	2,057
Loss on impairment	22	0
Changes in operating assets and liabilities
Accounts receivable	4,690	(3,426)
Inventories	(2,376)	(1,810)
Prepaid expenses and other current receivables	1,041	(116)
Other assets	(139)	(30)
Accounts payable and accrued expenses	(11,824)	259
Net cash used in operating activities	(9,549)	(897)
Cash flows from investing activities:
Capital expenditures	(4,094)	(5,769)
Net cash used in investing activities	(4,094)	(5,769)
Cash flows from financing activities:
Proceeds from exercise of common stock options	0	6
Net cash provided by financing activities	0	6
Effect of exchange rate on cash and cash equivalents	(287)	132
Net decrease in cash, cash equivalents and restricted cash	(13,643)	(6,660)
Cash, cash equivalents and restricted cash at beginning of period	27,165	66,481
Cash, cash equivalents and restricted cash at end of period	13,235	59,953
Supplemental Cash flow information:
Cash payments for income taxes	0	43
Non cash investing and financing transactions:
Acquisition of capital expenditures in accounts payable and accrued expenses	3,421	2,298
Capitalized interest in capital expenditures	1,348	485
Capitalized stock compensation in capital expenditures	$ 30	$ 30