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Note D- Concentration of Risk (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Cash, Uninsured Amount $ 811,000 $ 4,073,000
Accounts Receivable, Net 3,133,246 3,391,405
Allowance for Doubtful Accounts Receivable, Noncurrent $ 500,000
Percentage of Remaining Balance Owned Reserved 24.00%  
Customer C [Member]    
Accounts Receivable, Net $ 2,070,000  
Allowance for Doubtful Accounts Receivable, Noncurrent $ 500,000  
Percentage of Remaining Balance Owned Reserved 24.00%