CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net loss	$ (6,694)	$ (7,014)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation and amortization	923	672
Stock compensation expense	1,319	1,614
Change in fair value of warrants	(302)	205
Inventory provision	86	0
Deferred rent expense	260	0
Tenant improvement reimbursement	607	0
Foreign currency translation loss	11	10
Gain on sales of fixed assets	0	(35)
Changes in operating assets and liabilities:
Inventory	(1,099)	(157)
Accounts receivable	1,888	(789)
Other current assets	(385)	(1,235)
Accounts payable	(2,305)	(412)
Accrued expenses	(711)	(1,458)
Other non-current assets and liabilities, net	0	8
Net cash used for operating activities	(6,402)	(8,591)
Investing activities:
Expenditures for property, plant and equipment	(1,074)	(1,555)
Other	93	35
Net cash used in investing activities	(981)	(1,520)
Financing activities:
Net proceeds from issuance of common stock	352	3
Borrowings under revolving credit agreement	2,400	0
Deferred financing costs	(96)	0
Payments on long-term debt	(19)	(17)
Net cash provided by (used in) financing activities	2,637	(14)
Net decrease in cash	(4,746)	(10,125)
Cash at beginning of period	14,581	30,343
Cash at end of period	9,835	20,218
Supplemental cash flow information (non-cash):
Additions to equipment in process included in accounts payable	$ 11	$ 700