Note 4 - Equipment and Leasehold Improvements

12 Months Ended

Dec. 31, 2022

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

4. Equipment and Leasehold Improvements

Equipment and leasehold improvements consisted of the following:

	Year Ended December 31,
	2022			2021			Estimated Useful Life (in years)
Machinery and equipment(1)	$	6,610,000		$	6,270,000		2.5	-	10
Computer and software		631,000			631,000		2	-	5
Office equipment		256,000			256,000		5	-	10
Leasehold improvements		932,000			932,000		5 years or remaining lease term
Total equipment		8,429,000			8,089,000
Less accumulated depreciation		(7,175,000	)		(6,828,000	)
Total equipment and leasehold improvements, net	$	1,254,000		$	1,261,000

⁽¹⁾ Includes $391,000 and $140,000 for cost related to construction in progress for the years ended December 31, 2022 and 2021, respectively.

Depreciation expense for the years ended December 31, 2022 and 2021 was $387,000 and $429,000, respectively.