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Note 9 - Concentration of Credit Risk
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
Note
9.
     Concentration of Credit Risk
 
The Company maintains its cash balances in
two
financial institutions. The amount on deposit in the financial institution is insured by the Federal Deposit Insurance Corporation up to
$250,000.