Note 18 - Fair Value Disclosure of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	December 31,
	2022				2021
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Notes payable, net (1)	$	6,780,969	$	5,837,401	$	7,027,050	$	7,330,723
Mortgages payable, net (2)	$	376,917	$	311,659	$	448,652	$	449,758

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

	Balance at December 31, 2022		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	597,732	$	597,732	$	-	$	-
Liabilities:
Embedded derivative liability	$	56,000	$	-	$	-	$	56,000

	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, 2021		Level 1		Level 2		Level 3
Other investments	$	9,834	$	-	$	-	$	9,834