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Long-Term Debt (Details Narrative) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Dec. 31, 2017
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Mar. 19, 2021
Feb. 06, 2019
Nov. 17, 2017
Line of Credit Facility [Line Items]                      
Outstanding letters of credit   $ 506,000       $ 506,000          
Principal sum   178,334,000       178,334,000   $ 89,964,000      
Debt cost amortization   37,000   $ 113,000              
Capitalized interest   999,000   $ 948,000   $ 2,892,000 $ 2,823,000        
Dock 79 Eagle Bank [Member]                      
Line of Credit Facility [Line Items]                      
Loan term         120 months            
Principal sum                     $ 90,000,000
Fixed interest rate                     4.125%
Prepayment penalty     $ 900,000                
Dock 79 Loan [Member]                      
Line of Credit Facility [Line Items]                      
Principal sum                 $ 92,070,000    
Fixed interest rate                 3.03%    
Transfer terms Either loan may be prepaid subsequent to April 1, 2024, subject to yield maintenance premiums. Either loan may be transferred to a qualified buyer as part of a one-time sale subject to a 60% loan to value, minimum of 7.5% debt yield and a 0.75% transfer fee                    
Maren [Member]                      
Line of Credit Facility [Line Items]                      
Principal sum                 $ 88,000,000    
Fixed interest rate                 3.03%    
Transfer terms Either loan may be prepaid subsequent to April 1, 2024, subject to yield maintenance premiums. Either loan may be transferred to a qualified buyer as part of a one-time sale subject to a 60% loan to value, minimum of 7.5% debt yield and a 0.75% transfer fee                    
Wells Fargo Level I [Member]                      
Line of Credit Facility [Line Items]                      
Interest rate spread           1.50%          
Commitment fee           0.25%          
Wells Fargo Level I I [Member]                      
Line of Credit Facility [Line Items]                      
Interest rate spread           1.25%          
Commitment fee           0.20%          
Wells Fargo Level I I I [Member]                      
Line of Credit Facility [Line Items]                      
Interest rate spread           1.00%          
Commitment fee           0.15%          
Wells Fargo [Member]                      
Line of Credit Facility [Line Items]                      
Loan term               5 years      
Maximum facility amount                   $ 20,000,000  
Revolver outstanding   0       $ 0          
Outstanding letters of credit   506,000       506,000          
Available for borrowing   $ 19,494,000       $ 19,494,000          
Letter of credit fee           1.00%          
Applicable interest rate   1.08238%       1.08238%          
Dividend limit   $ 228,000,000       $ 228,000,000          
Covenant compliance           all