Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.5.0.2
Debt (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2016
Jun. 30, 2016
Jun. 30, 2015
Debt Instrument [Line Items]      
Mortgage principal payments   $ 103,603 $ 257,648
Long-term investments pledged against line of credit   $ 5,000,000  
Mortgage [Member]      
Debt Instrument [Line Items]      
Interest rate   6.83%  
Maturity date   Mar. 01, 2016  
Mortgage principal payments $ 104,000    
Line of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit, maximum borrowing capacity   $ 10,000,000  
Line of credit, amount outstanding   3,100,000 $ 3,100,000
Line of credit, remaining borrowing capacity   $ 6,900,000  
Line of credit facility, interest rate at period end   2.00%  
Line of credit, expiration date   Oct. 31, 2016  
Line of Credit [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Line of credit, basis spread on variable rate   1.50%