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Investment Securities (Tables)
12 Months Ended
Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]  
Schedule of cost, gross unrealized gains, gross unrealized losses and fair value of available-for-sale securities
       Gross   Gross     
   Amortized   Unrealized   Unrealized   Fair 
   Cost   Gains   Losses   Value 
2017                    
Certificates of deposit  $8,557,000   $   $   $8,557,000 
Municipal bonds   871,872    258    (2,162)   869,968 
2017 Total investment securities  $9,428,872   $258   $(2,162)  $9,426,968 
2016                    
Certificates of deposit  $4,871,000   $   $   $4,871,000 
Municipal bonds   707,593    1,466        709,059 
2016 Total investment securities  $5,578,593   $1,466   $   $5,580,059 
Schedule of contractual maturities of available-for-sale securities
   Years to Maturity     
   Less than   One to     
   One Year   Five Years   Total 
             
2017               
Available-for-sale  $8,829,542   $597,426   $9,426,968 
2016               
Available-for-sale  $4,811,511   $768,548   $5,580,059