Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details Textual)

v3.8.0.1
Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)
May 11, 2018
Apr. 02, 2018
Apr. 27, 2018
Subsequent Event [Line Items]      
Common Stock, Dividends, Per Share, Declared   $ 0.105  
Payments of Dividends   $ 1,618,653  
Accounts and Notes Receivable, Net     $ 1,200,000
Dividends Payable, Date Declared   Apr. 02, 2018  
Dividends Payable, Date to be Paid   Apr. 19, 2018  
Dividends Payable, Date of Record   Apr. 12, 2018  
Maximum percentage of borrowing capacity 75.00%    
Line of Credit Facility, Maximum Borrowing Capacity $ 47,700,000    
Revolving Credit Facility [Member]      
Subsequent Event [Line Items]      
Proceeds from Issuance of Long-term Debt $ 35,000,000    
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Subsequent Event [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 4.00%