Note 5 - Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31,
	2019			2018
Buildings	$	493,000		$	493,000
Machinery and equipment		12,227,000			11,231,000
Office furniture and equipment		1,390,000			1,260,000
Leasehold improvements		508,000			508,000
Software		438,000			373,000
		15,056,000			13,865,000
Less accumulated depreciation and amortization		(11,113,000	)		(10,621,000	)
Total net property and equipment	$	3,943,000		$	3,244,000