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Indebtedness (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Required principal payments during the next five years and thereafter
The required principal payments due during the next five years and thereafter under all our outstanding debt at December 31, 2021 are as follows:
2022$1,500,000 
2023500,000 
20241,175,000 
20251,150,000 
2026800,000 
Thereafter2,075,000 
 $7,200,000