Note 9 - Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Marketable Securities [Table Text Block]

	As of December 31, 2021		As of December 31, 2020
Marketable securities:
Amortized cost	$	114,159	$	114,531
Unrealized gains, net		1,097,580		592,423
Total fair value	$	1,211,739	$	706,954