Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
ASSETS
Cash and cash equivalents	$ 6,981	$ 6,720
Restricted cash	1,100	2,800
Accounts receivable, net of reserves of $41 (2018) and $44 (2017)	2,831	2,997
Inventories	3,465	4,105
Prepaid expenses and other current assets	581	303
Total current assets	14,958	16,925
Property and equipment, net	364	459
Other assets	1,396	1,406
Total assets	16,718	18,790
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable	6,805	6,120
Revolving line of credit	2,133	2,024
Accrued payroll and related liabilities	595	807
Accrued expenses and other current liabilities	356	338
Note payable	115
Total current liabilities	10,004	9,289
Convertible promissory note and accrued interest, net of debt discount	15,022	14,766
Long-term warranty liability	70	61
Total liabilities	25,096	24,116
Commitments and contingencies
Stockholders' deficit:
Preferred stock, $0.001 par value - 10,000 shares authorized: Series A preferred stock, $0.001 par value; 1,000 shares authorized; none issued and outstanding
Common stock, $0.001 par value - 150,000 shares authorized; 102,333 (2018) and 79,314 (2017) shares issued and outstanding	102	80
Additional paid-in capital	157,656	152,640
Accumulated deficit	(166,136)	(158,046)
Total stockholders' deficit	(8,378)	(5,326)
Total liabilities and stockholders' deficit	$ 16,718	$ 18,790

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.