Note 11 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	September 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
Notes payable, net (1)	$	5,042,737	$	5,298,739	$	4,831,759	$	4,983,763
Mortgages and construction loan payable, net (2)	$	314,641	$	315,301	$	484,008	$	486,042

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	Balance at September 30, 2020		Level 1		Level 2		Level 3
Marketable equity securities	$	556,791	$	556,791	$	-	$	-

	Balance at December 31, 2019		Level 1		Level 2		Level 3
Marketable equity securities	$	9,353	$	9,353	$	-	$	-

	Balance at September 30, 2020		Level 1		Level 2		Level 3
Real estate	$	5,300	$	-	$	-	$	5,300

	Balance at December 31, 2019		Level 1		Level 2		Level 3
Real estate	$	39,510	$	-	$	-	$	39,510
Other real estate investments	$	32,974	$	-	$	-	$	32,974