Note 16 - Fair Value Disclosure of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	December 31,
	2020				2019
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Notes payable, net (1)	$	5,044,208	$	5,486,953	$	4,831,759	$	4,983,763
Mortgages and construction loan payable, net (2)	$	311,272	$	312,933	$	484,008	$	486,042

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

	Balance at December 31, 2020		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	706,954	$	706,954	$	-	$	-

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

	Balance at December 31, 2020		Level 1		Level 2		Level 3
Real estate	$	24,899	$	-	$	-	$	24,899
Other real estate investments	$	5,464	$	-	$	-	$	5,464

	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