Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash	$ 3,828	$ 3,381
Accounts receivable - less allowances of $2 in 2017 and $0 in 2016	1,406	881
Inventories	694	676
Prepaid expenses and other current assets	90	82
Total Current Assets	6,018	5,020
Property, plant and equipment, net	184	160
Total Assets	6,202	5,180
Current Liabilities:
Accounts payable	325	124
Accrued liabilities	913	906
Total Current Liabilities	1,238	1,030
Commitments and Contingencies (Note 12)
Stockholders' Equity:
Common stock, par value $0.01 per share, authorized 75,000,000; 10,378,975 issued in 2017 and 10,026,136 issued in 2016	104	100
Additional paid-in capital	139,022	138,794
Accumulated deficit	(120,398)	(120,980)
Common stock in treasury, at cost, 1,015,493 shares in both 2017 and 2016	(13,764)	(13,764)
Total stockholders' equity	4,964	4,150
Total Liabilities and Stockholders' Equity	$ 6,202	$ 5,180

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.