Note 6 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Marketable Securities [Table Text Block]

	As of June 30, 2020		As of December 31, 2019
Marketable securities:
Amortized cost (1)	$	114,587	$	12,064
Unrealized gains/(losses), net (1)		518,964		(2,711	)
Total fair value	$	633,551	$	9,353