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Note F - Investment in and Transactions With Equity Investees (Details Textual)
$ / shares in Units, ¥ in Millions
1 Months Ended 12 Months Ended
Oct. 08, 2021
USD ($)
Oct. 08, 2021
CNY (¥)
Apr. 30, 2020
USD ($)
Apr. 29, 2020
USD ($)
Jul. 31, 2020
USD ($)
May 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2018
USD ($)
Mar. 27, 2021
Apr. 23, 2020
$ / shares
Jun. 30, 2014
USD ($)
Income (Loss) from Equity Method Investments, Total             $ 242,589 $ 97,887        
Acquisition of Advanced Cosmetic Systems [Member]                        
Business Acquisition, Percentage of Voting Interests Acquired           50.00%       100.00%    
Business Combination, Consideration Transferred, Total           $ 900,000            
Business Combination, Percentage of Ownership Interest that Seller of Ownership Interest May Repurchase Within One Year of Sale Date           50.00%            
Business Combination, Price at Which the Additional Ownership Interest Acquired May Repurchased Within One Year of Sale Date           $ 900,000            
Manufacturing Agreement for Handpieces [Member]                        
Related Party Transaction, Purchases from Related Party       $ 370,260     1,700,000 1,900,000        
Sale Price in Cash [Member]                        
Related Party Transaction, Purchases from Related Party     $ 100,000   $ 100,000              
Sale Price in Share [Member]                        
Related Party Transaction, Purchases from Related Party     $ 170,260                  
Share Price (in dollars per share) | $ / shares                     $ 1.59  
Milestone China [Member]                        
Equity Method Investments             0 0       $ 1,000,000
Equity Method Investment, Ownership Percentage                       40.00%
Financing Receivable, after Allowance for Credit Loss, Total                 $ 2,800,000      
Proceeds from Collection of Finance Receivables                 $ 950,000      
Revenue from Related Parties             270,000,000,000 75,000        
Contract with Customer, Liability, Total             89,000 $ 183,000        
Number of Medical Instruments Sold               100        
Related Party Transaction, Purchases from Related Party             0 $ 0        
Due from Related Parties, Total               1,400,000        
Costs and Expenses, Related Party               370,260        
Equity Method Investment, Realized Gain (Loss) on Disposal, Total             407,000          
Income (Loss) from Equity Method Investments, Total             242,000 98,000        
Milestone China [Member] | Accounts Receivable from Related Parties [Member]                        
Equity Method Investment, Deferred Intercompany Profit (Loss)             $ 0 $ 242,000        
Milestone Beijing [Member] | Milestone China [Member]                        
Equity Method Investment, Ownership Percentage                       75.00%
Anhui [Member]                        
Equity Method Investment, Ownership Percentage             28.40%          
Anhui [Member] | Milestone China [Member] | Chief Executive Officer [Member]                        
Equity Method Investment, Ownership Percentage 28.40% 28.40%                    
Proceeds from Sale of Equity Method Investments $ 440,351 ¥ 2,840