Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 5,944	$ 7,772
Restricted cash	5	5
Accounts receivable, net	1,214	1,374
Inventories	797	1,195
Prepaid expenses and other current assets	232	338
Total current assets	8,192	10,684
Property, plant and equipment, net	654	525
Intangibles, net	88	69
Deferred income taxes	409	493
Other assets	59	59
Total assets	9,402	11,830
Current liabilities
Accounts payable	189	255
Accrued liabilities	323	345
Accrued income taxes	32	103
Total current liabilities	544	703
Total liabilities	544	703
Commitments and contingencies (see note 9)
Stockholders' equity
Preferred stock, $0.01 par value: 1,000 shares authorized, no shares issued or outstanding
Common stock, $0.001 par value: 30,000 shares authorized, 6,479 and 7,328 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	7	7
Additional paid-in-capital	57,808	60,527
Accumulated other comprehensive income	14	41
Accumulated deficit	(48,971)	(49,448)
Total stockholders' equity	8,858	11,127
Total liabilities and stockholders' equity	$ 9,402	$ 11,830

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.