Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,948	$ 4,236
Accounts receivable, net of allowance for doubtful accounts of $74 and $72, respectively	3,417	3,830
Inventories	1,208	1,289
Prepaid expenses and other current assets	353	410
Total current assets	8,926	9,765
Property and equipment:
Furniture and fixtures	163	162
Leasehold improvements	8	8
Equipment	1,131	1,058
Property and equipment, Gross	1,302	1,228
Accumulated depreciation	936	882
Property and equipment, Net	366	346
Operating lease assets, net	370	0
Intangible assets, net	3,586	3,317
Deferred income taxes	57	56
TOTAL ASSETS	13,305	13,484
Current liabilities:
Accounts payable	248	878
Deferred revenue	628	716
Warranty	573	656
Accrued compensation	145	224
Operating lease obligations	254	0
Other current liabilities	291	373
Total current liabilities	2,139	2,847
Operating lease obligations	116	0
TOTAL LIABILITIES	2,255	2,847
Shareholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value; 20,000,000 shares authorized, 5,293,941 and 5,278,485 issued and outstanding at March 31, 2019 and December 31, 2018, respectively	52	52
Additional paid-in capital	24,592	24,550
Accumulated other comprehensive loss	(342)	(372)
Accumulated deficit	(13,252)	(13,593)
Total shareholders' equity	11,050	10,637
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 13,305	$ 13,484