Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 2,120	$ 1,547
Accounts receivable, net of allowance for doubtful accounts of $72 and $90 respectively	2,812	3,011
Inventories	224	141
Prepaid expenses and other current assets	290	281
Total current assets	5,446	4,980
Property and equipment:
Furniture and fixtures	487	486
Leasehold improvements	426	426
Equipment	3,612	3,561
[PropertyPlantAndEquipmentGross]	4,525	4,473
Accumulated depreciation	4,173	4,102
[PropertyPlantAndEquipmentNet]	352	371
Intangible assets, net	2,879	2,795
Deferred income taxes	58	58
TOTAL ASSETS	8,735	8,204
Current liabilities:
Accounts payable	641	256
Warranty	1,124	1,223
Accrued compensation	239	193
Other current liabilities	250	323
Total current liabilities	2,254	1,995
Deferred tax liabilities	1
TOTAL LIABILITIES	2,255	1,995
Shareholders' equity
Preferred stock, $.01 par value; 5,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value; 20,000,000 shares authorized, 5,147,916 and 5,094,473 issued and outstanding at March 31, 2017 and December 31, 2016, respectively.	51	50
Additional paid-in capital	24,120	24,055
Accumulated other comprehensive loss	(356)	(363)
Accumulated deficit	(17,335)	(17,533)
Total shareholders' equity	6,480	6,209
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 8,735	$ 8,204