Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 4,831	$ 4,698
Restricted cash	100	100
Accounts receivables, net	2,046	1,802
Inventories, net	2,718	1,564
Prepaid expenses and other current assets	188	163
Total current assets	9,883	8,327
Non-current assets:
Property and equipment, net	120	172
Other assets	119	68
Total assets	10,122	8,567
Current liabilities:
Accounts payable	1,082	1,065
Accrued payroll and related liabilities	326	173
Deferred service revenue, short-term	710	834
Other accrued liabilities	453	454
Total current liabilities	2,571	2,526
Long-term liabilities:
Other long-term liabilities	39	52
Deferred service revenue	108	93
Total long-term liabilities	147	145
Total liabilities	2,718	2,671
Shareholders’ equity:
Preferred stock, no par value; 5,000,000 shares authorized; no shares issued	0	0
Common stock, no par value; 50,000,000 shares authorized, shares issued and outstanding 2,048,118 at September 30, 2018 and 2,042,019 shares at December 31, 2017	19,519	19,480
Accumulated deficit	(12,115)	(13,584)
Total shareholders’ equity	7,404	5,896
Total liabilities and shareholders’ equity	$ 10,122	$ 8,567