CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 89	$ 208
Accounts receivable, less allowance for doubtful accounts of $171	170	175
Inventories, less reserve of $338 and $513	321	330
Prepaid expenses	23	17
Total current assets	603	730
Property and equipment, less accumulated depreciation of $577 and $654	830	919
Intangible assets, less accumulated amortization of $5 and $4	8	9
Other assets	201	211
Total assets	1,642	1,869
Current liabilities:
Accounts payable, trade and accrued liabilities	856	849
Unearned revenue	27	27
Advances from related parties	670	600
Notes payable - current portion	482	461
Convertible debentures, less debt discount of $230 and $460	230	0
Embedded conversion derivative liabilities	705	760
Total current liabilities	2,970	2,697
Notes payable - noncurrent portion	0	9
Total liabilities	2,970	2,706
Stockholders’ deficit:
Common stock: $0.0001 par value; 22,500,000 shares authorized; 14,275,797 and 13,886,738 shares issued and outstanding	1	1
Additional paid-in capital	124,947	124,483
Accumulated deficit	(126,945)	(126,016)
Treasury stock: 150 shares at cost	(15)	(15)
Total stockholders’ deficit	(1,328)	(837)
Total liabilities and stockholders’ deficit	1,642	1,869
Series A Preferred Stock
Stockholders’ deficit:
Preferred stock value	435	448
Series B Preferred Stock
Stockholders’ deficit:
Preferred stock value	$ 249	$ 262