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

12 Months Ended

Dec. 31, 2016

Notes Tables

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

Year ended December 31,	2016			2015
Risk free interest rate		.28	%		.27	%
Expected life of option in years		10			10
Expected dividend yield rate		0	%		0	%
Expected volatility		65	%		66	%

Components [Member]

Notes Tables

Property, Plant and Equipment [Table Text Block]

(in thousands)	201 6			201 5
Machinery and equipment	$	1,696		$	2,178
Furniture and fixtures		154			197
Leasehold improvements		0			258
Building		308			308
Subtotal		2,158			2,941
Accumulated depreciation		(1,458	)		(2,305	)
Property and equipment, net	$	700		$	636

Useful Lives [Member]

Notes Tables

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