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Commercial Loans Receivables and Allowance for Loan Loss (Inventory Finance Notes Receivables, Net) (Details) - USD ($)
Dec. 30, 2017
Sep. 30, 2017
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Apr. 02, 2016
Commercial Loans Receivable            
Allowance for loan loss $ (153,000) $ (242,000) $ (210,000) $ (130,000) $ (126,000) $ (128,000)
Financing Receivable, Net 26,854,000   25,833,000      
Direct inventory finance receivables [Member]            
Commercial Loans Receivable            
Financing Receivable, Gross 25,801,000   24,959,000      
Allowance for loan loss (153,000)   (210,000)      
Participation inventory finance receivables [Member]            
Commercial Loans Receivable            
Financing Receivable, Gross 1,206,000   1,084,000      
Allowance for loan loss $ 0   $ 0