Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 4,663	$ 3,691
Restricted cash	100	100
Accounts receivable, net	1,453	1,583
Inventories, net	1,082	1,360
Prepaid expenses and other current assets	171	166
Total current assets	7,469	6,900
Non-current assets:
Property and equipment, net	172	286
Other assets	70	77
Total assets	7,711	7,263
Current liabilities:
Accounts payable	902	888
Accrued payroll and related liabilities	206	222
Deferred service revenue, short term	850	787
Other accrued liabilities	378	359
Total current liabilities	2,336	2,256
Long term liabilities:
Other long term liabilities	52	63
Deferred service revenue	102	105
Total long term liabilities	154	168
Total liabilities	2,490	2,424
Shareholders’ equity:
Preferred stock, no par value; 5,000 shares authorized; no shares issued	0	0
Common stock, no par value; 50,000 shares authorized, 2,042 shares issued and outstanding as of September 30, 2017 and December 31, 2016	19,476	19,063
Accumulated deficit	(14,255)	(14,224)
Total shareholders’ equity	5,221	4,839
Total liabilities and shareholders’ equity	$ 7,711	$ 7,263