Note 5 - Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31,			December 31,
	2018			2017			Estimated Useful Life (years)
Machinery and equipment	$	6,136,000		$	6,507,000			2.5	-	10
Computer and software		664,000			718,000			2	-	5
Office equipment		264,000			253,000			5	-	10
Leasehold improvements		931,000			528,000		Shorter of 5 years or remaining lease term
Total equipment		7,995,000			8,006,000
Less accumulated depreciation and amortization		(5,433,000	)		(5,010,000	)
Total equipment and leasehold improvements, net	$	2,562,000		$	2,996,000