Note 5 - Common Stock Investment (Tables)

9 Months Ended

Sep. 30, 2021

Common Stock [Member]

Notes Tables

Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]

	Investment		Shares				Fair Value
Investment	Date	Property Type	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Common Stock
NexPoint Storage Partners	11/6/2020	Self-storage		41,963		41,963	$	49,321	$	44,626