Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Mortgages (Details)

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Long-Term Debt - Mortgages (Details) - USD ($)
1 Months Ended
Apr. 30, 2021
Jul. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]        
Debt instrument carrying amount     $ 35,130,000 $ 13,495,000
Mortgage loan agreements        
Debt Instrument [Line Items]        
Debt instrument carrying amount     $ 7,380,000 $ 5,423,000
Loans payable in monthly installments of principal and interest   $ 32,000    
Mortgage loan agreements | Building        
Debt Instrument [Line Items]        
Debt instrument carrying amount $ 2,200,000 $ 5,500,000    
Debt interest rate 3.60% 3.67%    
Loans payable in monthly installments of principal and interest $ 130