Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 4,665,000	$ 4,781,000
Restricted cash	100,000	100,000
Accounts receivables, net	1,745,000	1,809,000
Inventories, net	2,775,000	2,897,000
Prepaid expenses and other current assets	188,000	180,000
Total current assets	9,473,000	9,767,000
Non-current assets:
Property and equipment, net	99,000	112,000
Right-of-use	363,000
Other assets	132,000	119,000
Total non-current assets	594,000	231,000
Total assets	10,067,000	9,998,000
Current liabilities:
Accounts payable	943,000	1,023,000
Accrued payroll and related liabilities	175,000	185,000
Deferred service revenue, short-term	740,000	736,000
Lease liabilities, current	229,000
Other accrued liabilities	524,000	559,000
Total current liabilities	2,611,000	2,503,000
Long-term liabilities:
Other long-term liabilities	40,000	40,000
Lease liabilities, long term	152,000
Deferred service revenue	124,000	127,000
Total long-term liabilities	316,000	167,000
Total liabilities	2,927,000	2,670,000
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 1,971,283 at March 31, 2019 and 2,030,017 shares at December 31, 2018	19,097,000	19,426,000
Accumulated deficit	(11,957,000)	(12,098,000)
Total shareholders’ equity	7,140,000	7,328,000
Total liabilities and shareholders’ equity	$ 10,067,000	$ 9,998,000