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Note D - Accounts Receivable Concentration Risk by Major Customer (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Customer A [Member]    
Concentration Risk, Percentage 62.00%
Customer B [Member]    
Concentration Risk, Percentage 14.00%
Customer C [Member]    
Concentration Risk, Percentage 11.00%  
Customer D [Member]    
Concentration Risk, Percentage 62.00%