CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net loss	$ (815)	$ (2,301)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	852	740
Accretion of interest on long-term payment obligation	44	64
Stock-based compensation expense	687	635
Amortization of debt issuance costs	25	109
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	157	2,327
Inventories	1,431	(167)
Prepaid expenses and other assets	318	(262)
Accounts payable	268	(429)
Payment obligation liability	(310)	(300)
Deferred revenue	560	311
Accrued expenses and other liabilities	(1,728)	(262)
Net cash provided by operating activities	1,489	465
Cash flows from investing activities:
Capital expenditures	(65)	(67)
Acquisition of business, net of cash acquired	(1,287)	(1,384)
Net cash used in investing activities	(1,352)	(1,451)
Cash flows from financing activities:
Proceeds from issuance of debt, net of issuance costs	1,646	9,599
Repayments of debt	(1,371)	(10,952)
Repayments of notes payable	(2,000)
Taxes paid related to net share settlement of restricted stock units	(228)	(162)
Net cash used in financing activities	(1,953)	(1,515)
Effect of exchange rates on cash	(120)	134
Net decrease in cash	(1,936)	(2,367)
Cash at beginning of period	10,866	19,052
Cash at end of period	8,930	16,685
Supplemental Disclosures of Cash Flow Information:
Interest paid	245	353
Taxes paid, net	29	44
Non-cash investing and financing activities:
Stock issued for acquisition of business		1,000
Promissory notes issued in acquisition of business		2,000
Common Stock
Non-cash investing and financing activities:
Stock issued for acquisition of business	$ 1,635	$ 2,294