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Note 6 - Credit Facility (Details Textual) - USD ($)
3 Months Ended
May. 21, 2015
Mar. 31, 2016
Mar. 31, 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   $ 8,500,000    
Line of Credit Facility, Remaining Borrowing Capacity   $ 500,000    
Long-term Debt, Weighted Average Interest Rate   3.75% 2.87%  
Debt Instrument, Interest Rate, Stated Percentage   3.75%    
Debt Issuance Costs, Net   $ 13,000   $ 11,000
Huntington National Bank [Member]        
Repayments of Lines of Credit $ 5,000,000      
Interest Costs Capitalized   $ 0 $ 33,000