Note 7 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Dividends Declared [Table Text Block]

Declaration date	Dividend		Total paid
September 1, 2020	$	0.05	$	677,869
December 1, 2020		0.05		679,779
March 1, 2021		0.05		680,247
June 1, 2021		0.06		816,604
September 1, 2021		0.06		821,628
December 1, 2021		0.06		822,120

Class of Treasury Stock [Table Text Block]

	Total shares purchased		Average price per share		Total number of shares purchased as part of publicly announced plan		Approximate dollar value of shares that may be purchased under the plan
July, 2020		675	$	6.21		675	$	1,200,000
August, 2020		22,963		6.20		23,638		1,000,000
Total		23,638