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Note 7 - Credit Facility (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
May 21, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
The Home Savings and Loan Company [Member] | Prime Rate [Member] | Line of Credit [Member]            
Debt Instrument, Basis Spread on Variable Rate 0.25%          
The Home Savings and Loan Company [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 9,000,000          
Long-term Line of Credit   $ 9,000,000   $ 9,000,000    
Debt Instrument, Interest Rate During Period   3.75% 3.50% 3.75% 3.16%  
Debt Instrument, Interest Rate, Stated Percentage   3.75%   3.75%    
Debt Issuance Costs, Net   $ 6,000   $ 6,000   $ 11,000
Huntington National Bank [Member]            
Repayments of Lines of Credit $ 5,000,000          
Interest Costs Capitalized   $ 0 $ 20,000 $ 0 $ 97,000