Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,322	$ 3,190
Accounts receivable, net of allowance for doubtful accounts of $23 and $20, respectively	2,756	3,339
Inventories	388	335
Prepaid expenses and other current assets	347	255
Total current assets	6,813	7,119
Property and equipment:
Furniture and fixtures	164	164
Leasehold improvements	26	26
Equipment	1,046	998
Property and equipment, Gross	1,236	1,188
Accumulated depreciation	764	702
Property and equipment, Net	472	486
Intangible assets, net	3,440	3,485
Deferred income taxes	37	38
TOTAL ASSETS	10,762	11,128
Current liabilities:
Accounts payable	612	563
Warranty	777	858
Accrued compensation	170	288
Other current liabilities	505	778
Total current liabilities	2,064	2,487
TOTAL LIABILITIES	2,064	2,487
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, 5,256,226 and 5,210,448 issued and outstanding at March 31, 2018 and December 31, 2017, respectively	52	51
Additional paid-in capital	24,429	24,355
Accumulated other comprehensive loss	(311)	(310)
Accumulated deficit	(15,472)	(15,455)
Total shareholders' equity	8,698	8,641
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 10,762	$ 11,128

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.