Note 2 - Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31 , 201 8		December 31, 201 7
Raw materials	$	136	$	55
Finished goods		2,761		1,509
Inventories, net	$	2,897	$	1,564

Property, Plant and Equipment [Table Text Block]

	December 31 , 201 8			December 31, 201 7
Leasehold improvements	$	114		$	114
Furniture and fixtures		286			268
Machinery and equipment		844			842
Total property and equipment		1,244			1,224
Less accumulated depreciation and amortization		(1,132	)		(1,052	)
Property and equipment, net	$	112		$	172

Schedule of Accrued Liabilities [Table Text Block]

	December 31 , 201 8		December 31, 201 7
Accrued salaries and payroll taxes	$	66	$	59
Accrued vacation		119		114
Accrued bonuses		-		-
Total accrued payroll and related liabilities	$	185	$	173

Schedule of Other Accrued Liabilities [Table Text Block]

	December 31 , 201 8		December 31, 201 7
Accrued warranty	$	365	$	322
Accrued outside commissions		41		69
Accrued contingent legal fees		100		-
Accrued deferred rent		22		29
Other accrued liabilities		31		34
Total other accrued liabilities	$	559	$	454