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Subsequent Events (Details Textual)
Nov. 08, 2019
USD ($)
a
ft²
Sep. 24, 2019
USD ($)
Sep. 23, 2019
USD ($)
Subsequent Event | Cadillac Castings, Inc      
Subsequent Event [Line Items]      
Acquired ownership percentage of investment 19.90%    
Purchase price for investment $ 3,000,000    
Area of real estate property | ft² 275,000    
Subsequent Event | Cadillac Castings, Inc | Land and Building      
Subsequent Event [Line Items]      
Area of real estate property | a 43    
Revolving Credit Facility | Line of Credit      
Subsequent Event [Line Items]      
Credit facility maximum borrowing capacity   $ 20,000,000 $ 17,000,000
Revolving Credit Facility | Line of Credit | Subsequent Event      
Subsequent Event [Line Items]      
Credit facility maximum borrowing capacity $ 17,000,000    
Amount of principal remaining $ 10,000,000