Note 9 - Property and Equipment

12 Months Ended

Dec. 31, 2019

9 .	Property and Equipment

The major classes of property and equipment are as follows:

	Useful Life (in years)			201 9		201 8
Production machinery and equipment		5		$	575,091	$	575,091
Other machinery and equipment, primarily computers and research equipment	3	–	5		296,987		323,259
Furniture and fixtures		7			2,576		4,327
Purchased software		3			320,435		336,060
Leasehold improvements*	Term of Lease				12,448		12,448
Total property and equipment				$	1,207,537	$	1,251,185

We amortize leasehold improvements over the term of the lease, which in all cases is shorter than the estimated useful life of the asset.

During

2019

and

2018,

we recorded

$103,000

and

$121,000,

respectively, of depreciation and amortization related to property and equipment. See Note

(i).