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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, 2019
Dec. 31, 2018
Share-based compensation expense $ 947,720 $ 980,224
Selling, General and Administrative Expenses [Member]    
Share-based compensation expense 828,981 855,125
Research and Development Expense [Member]    
Share-based compensation expense $ 118,739 $ 125,099