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Note O - Related Party Transactions (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Jul. 10, 2017
Jul. 31, 2017
Dec. 31, 2022
Dec. 31, 2021
Mar. 02, 2021
Mar. 01, 2021
Interim Chief Executive Officer [Member]            
Royalty on Net Sales, Percentage         2.50%  
Director Clinical Affair [Member]            
Royalty on Net Sales, Percentage         2.50% 5.00%
Director of Clinical Affairs [Member]            
Royalty Expense     $ 442,000 $ 446,000    
Professional Fees     154,000 158,000    
Accounts Payable, Related Parties     120,000 123,000    
Previous President and Chief Executive Officer [Member]            
Increase (Decrease) in Deferred Compensation $ (100,000) $ (100,000)        
Employment Agreement, Base Compensation 200,000 200,000        
Deferred Compensation Arrangement with Individual, Compensation Expense     200,000 125,000    
Consultant [Member]            
Increase (Decrease) in Deferred Compensation (100,000) 100,000        
Employment Agreement, Base Compensation $ 200,000 $ 200,000        
Deferred Compensation Arrangement with Individual, Compensation Expense     200,000 125,000    
Managing Director, China Operations [Member]            
Deferred Compensation Arrangement with Individual, Compensation Expense     200,000 125,000    
Manufacturing Agreement for Handpieces [Member]            
Related Party Transaction, Purchases from Related Party     3,400,000 1,700,000    
Manufacturing Agreement for Handpieces [Member] | Accounts Payable, Related Parties, Current [Member]            
Due to Related Parties, Current, Total     819,000 548,000    
Consulting Services [Member]            
Related Party Transaction, Expenses from Transactions with Related Party     $ 100,000 $ 100,000