CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (5,333)	$ (3,614)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,362	2,081
Loss (gain) on extinguishment of debt, net	1,369	(977)
Accretion of interest on long-term payment obligation	180	277
Amortization of debt issuance costs	280	617
Stock-based compensation expense	1,987	1,916
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	202	(1,197)
Inventories	(614)	(1,785)
Prepaid expenses and other assets	(866)	(992)
Accounts payable	(1,871)	1,531
Payment obligation liability	(920)	(892)
Deferred revenue	(525)	58
Accrued expenses and other liabilities	738	(2,087)
Net cash used in operating activities	(3,011)	(5,064)
Cash flows from investing activities:
Capital expenditures	(634)	(686)
Acquisition of business, net of cash acquired	(1,384)
Net cash used in investing activities	(2,018)	(686)
Cash flows from financing activities:
Proceeds from issuance of debt, net of issuance costs	16,941	42,735
Repayments of debt	(23,612)	(42,805)
Proceeds from issuance of common stock, net of issuance costs		12,560
Taxes paid related to net share settlement of restricted stock units	(502)	(594)
Proceeds from issuance of Series B preferred stock, net of issuance costs	7,895
Proceeds from exercise of stock options	13
Net cash provided by financing activities	735	11,896
Effect of exchange rates on cash	(518)	479
Net (decrease) increase in cash	(4,812)	6,625
Cash at beginning of period	19,052	9,116
Cash at end of period	14,240	15,741
Supplemental Disclosures of Cash Flow Information:
Interest paid	1,571	1,379
Taxes paid, net	109	96
Non-cash investing and financing activities:
Warrants issued as debt issuance costs in connection with debt agreements		2,319
Liability to be settled in common stock		$ 250
Issuance of shares to non-employees	11
Promissory notes issued in acquisition of business	2,000
Common Stock
Non-cash investing and financing activities:
Stock issued for acquisition of business, net	$ 2,635