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Note A - The Company and Summary of Significant Accounting Policies - Share-based Compensation Expenses for Continuing Operations (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based compensation expense $ 980,224 $ 972,764
Selling, General and Administrative Expenses [Member]    
Share-based compensation expense 855,125 864,036
Research and Development Expense [Member]    
Share-based compensation expense $ 125,099 $ 108,728