CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows used in operating activities:
Net loss	$ (4,703)	$ (8,152)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,167	2,752
Loss on extinguishment of debt, net	1,369	788
Accretion of interest on long-term payment obligation	229	305
Amortization of debt issuance costs	337	807
Stock-based compensation expense	2,646	2,480
Changes in operating assets and liabilities:
Accounts receivable	(68)	(2,786)
Inventories	(959)	484
Prepaid expenses and other assets	(1,297)	(275)
Accounts payable	(1,819)	(222)
Payment obligation liability	(1,230)	(1,192)
Deferred revenue	(1,449)	5
Accrued expenses and other liabilities	(1,419)	(2,705)
Net cash used in operating activities	(5,196)	(7,711)
Cash flows from investing activities:
Capital expenditures	(1,346)	(967)
Acquisition of business, net of cash acquired	(2,027)
Net cash used in investing activities	(3,373)	(967)
Cash flows from financing activities:
Proceeds from issuance of debt, net of issuance costs	21,801	53,035
Repayments of debt	(28,214)	(58,741)
Proceeds from issuance of common stock, net of issuance costs		12,560
Taxes paid related to net share settlement of restricted stock units	(668)	(777)
Proceeds from issuance of Series B preferred stock, net of issuance costs	7,876	11,879
Proceeds from exercise of stock options	13
Net cash provided by financing activities	808	17,956
Effect of exchange rates on cash	(425)	658
Net (decrease) increase in cash	(8,186)	9,936
Cash and cash equivalents at beginning of period	19,052	9,116
Cash and cash equivalents at end of period	10,866	19,052
Supplemental Disclosures of Cash Flow Information:
Interest paid	1,787	2,661
Taxes paid, net	179	140
Non-cash investing and financing activities:
Warrants issued as debt issuance costs in connection with debt agreement		2,319
Liability settled in common stock		255
Property and equipment included in accounts payable and accruals		66
Cancellation of reacquired warrants		$ 1,282
Cumulative dividends on Series B Preferred Stock	833
Issuance of shares to non-employees	12
Promissory notes issued in acquisition of business	2,000
Common Stock
Non-cash investing and financing activities:
Common stock issued for acquisition of businesses	$ 5,132