Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 4,457	$ 3,691
Restricted cash	100	100
Accounts receivable, net	1,370	1,583
Inventories, net	1,110	1,360
Prepaid expenses and other current assets	97	166
Total current assets	7,134	6,900
Non-current assets:
Property and equipment, net	200	286
Other assets	73	77
Total assets	7,407	7,263
Current liabilities:
Accounts payable	833	888
Accrued payroll and related liabilities	286	222
Deferred service revenue, short term	859	787
Other accrued liabilities	330	359
Total current liabilities	2,308	2,256
Long term liabilities:
Other long term liabilities	52	63
Deferred service revenue	91	105
Total long term liabilities	143	168
Total liabilities	2,451	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 June 30, 2017 and December 31, 2016	19,063	19,063
Accumulated deficit	(14,107)	(14,224)
Total shareholders’ equity	4,956	4,839
Total liabilities and shareholders’ equity	$ 7,407	$ 7,263