Note 17 - Fair Value Disclosure of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	December 31,
	2021				2020
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Notes payable, net (1)	$	7,027,050	$	7,330,723	$	5,044,208	$	5,486,953
Mortgages payable, net (2)	$	448,652	$	449,758	$	311,272	$	312,933

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

	Balance at December 31, 2021		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	1,211,739	$	1,211,739	$	-	$	-

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

	Balance at December 31, 2021		Level 1		Level 2		Level 3
Other investments	$	9,834	$	-	$	-	$	9,834

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