Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 4,496	$ 9,476
Restricted cash	3,100	3,100
Accounts receivable, net of reserves of $90 (2017) and $151 (2016)	1,819	1,751
Inventories	4,908	3,160
Prepaid expenses and other current assets	1,851	1,766
Total current assets	16,174	19,253
Property and equipment, net	554	645
Other assets	83	70
Total assets	16,811	19,968
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable	6,648	4,028
Revolving line of credit	1,332	676
Accrued payroll and related liabilities	789	1,085
Accrued expenses and other current liabilities	263	270
Notes payable and capital lease obligation, current	141	151
Total current liabilities	9,173	6,210
Convertible promissory note, net of debt discount, and accrued interest	14,509	14,251
Long-term warranty liability	45	36
Total liabilities	23,727	20,497
Commitments and contingencies
Stockholders' deficit:
Preferred stock, $0.001 par value - 10,000 shares authorized; no shares issued and outstanding
Common stock, $0.001 par value - 150,000 shares authorized; 61,870 (2017) and 61,653 (2016) shares issued and outstanding	62	62
Additional paid-in capital	144,837	144,035
Accumulated deficit	(151,815)	(144,626)
Total stockholders' deficit	(6,916)	(529)
Total liabilities and stockholders' deficit	$ 16,811	$ 19,968

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.