Note 1 - Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Note 1 - Organization and Summary of Significant Accounting Policies (Tables) [Line Items]

Schedule of Inventory, Current [Table Text Block]

(in thousands)	2013		2012
Raw materials	$	940	$	795
Finished goods		166		87
Total inventories	$	1,106	$	882

Schedule of Capital Leased Assets [Table Text Block]

(in thousands)	2013			2012
Cost of leased equipment	$	473		$	1,139
Accumulated depreciation		(290	)		(878	)
Carrying value of leased equipment	$	183		$	261

Schedule of Finite-Lived Intangible Assets [Table Text Block]

(in thousands)	2013			2012
Patents	$	491		$	485
Accumulated amortization		(427	)		(378	)
Patents, net	$	64		$	107

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(in thousands)
2014	$	45
2015		4
2016		4
2017		4
2018 & thereafter		7
Total amortization expense	$	64

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Year ended December 31,	2013			2012
Risk free interest rate		2.5	%		1.75	%
Expected life of option in years		10			10
Expected dividend yield rate		0	%		0	%
Expected volatility		74	%		74	%

Useful Lives [Member]

Note 1 - Organization and Summary of Significant Accounting Policies (Tables) [Line Items]

Property, Plant and Equipment [Table Text Block]

Classification	Useful life in years
Machinery and equipment	3	–	5
Furniture and fixtures	5	–	7
Leasehold improvements	1	–	5
Building		39

Components [Member]

Note 1 - Organization and Summary of Significant Accounting Policies (Tables) [Line Items]

Property, Plant and Equipment [Table Text Block]

(in thousands)	2013			2012
Machinery and equipment	$	3,989		$	4,324
Furniture and fixtures		194			194
Leasehold improvements		281			277
Building		308			308
Subtotal		4,772			5,103
Accumulated depreciation		(3,627	)		(3,959	)
Property and equipment, net	$	1,145		$	1,144