Note 6 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Marketable Securities [Table Text Block]

	As of March 31, 2022		As of December 31, 2021
Marketable securities:
Amortized cost	$	115,529	$	114,159
Unrealized gains, net		1,219,344		1,097,580
Total fair value	$	1,334,873	$	1,211,739