Note 5 - Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31,
	2018			2017
Buildings	$	493,000		$	493,000
Machinery and equipment		11,231,000			11,036,000
Office furniture and equipment		1,260,000			1,151,000
Leasehold improvements		508,000			507,000
Software		373,000			177,000
		13,865,000			13,364,000
Less accumulated depreciation and amortization		(10,621,000	)		(10,206,000	)
	$	3,244,000		$	3,158,000