Note 3 - Property and Equipment (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2022

Dec. 31, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

	March 31, 2022			December 31, 2021
Equipment and furnishings	$	653,740		$	591,554
Leasehold improvements		115,605			115,605
Total property and equipment		769,345			707,159
Accumulated depreciation and amortization		(562,490	)		(550,221	)
Property and equipment, net	$	206,855		$	156,938

	2021			2020
Equipment and furnishings	$	591,554		$	543,836
Leasehold improvements		115,605			115,605
Total property and equipment		707,159			659,441
Accumulated depreciation and amortization		(550,221	)		(511,700	)
Property and equipment, net	$	156,938		$	147,741