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Commercial Loans Receivables and Allowance for Loan Loss (Commercial Loans Receivables, Net) (Details) - USD ($)
Jun. 30, 2018
Mar. 31, 2018
Jul. 01, 2017
Apr. 01, 2017
Commercial Loans Receivable        
Allowance for loan loss $ (113,000) $ (42,000) $ (222,000) $ (210,000)
Financing Receivable, Net 30,633,000 16,601,000    
Direct Commercial Loans Receivables [Member]        
Commercial Loans Receivable        
Financing Receivable, Gross 30,414,000 16,368,000    
Allowance for loan loss (113,000) (42,000)    
Participation Commercial Loans Receivables [Member]        
Commercial Loans Receivable        
Financing Receivable, Gross 332,000 275,000    
Allowance for loan loss $ 0 $ 0