Note 6 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Marketable Securities [Table Text Block]

	As of June 30, 2022		As of December 31, 2021
Marketable securities:
Amortized cost	$	115,862	$	114,159
Unrealized gains, net		957,844		1,097,580
Total fair value	$	1,073,706	$	1,211,739