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Note F - Investment in and Transactions with Equity Investees (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Apr. 29, 2020
Jul. 31, 2020
May 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Apr. 23, 2020
Jun. 30, 2014
Share Price (in dollars per share)         $ 0.84      
Income (Loss) from Equity Method Investments, Total       $ 97,887 $ 81,324      
Acquisition of Advanced Cosmetic Systems [Member]                
Business Acquisition, Percentage of Voting Interests Acquired     50.00%          
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          
Business Combination, Step Acquisition, Equity Interest in Acquiree, including Subsequent Acquisition, Percentage, Total     100.00%          
Manufacturing Agreement for Handpieces [Member]                
Related Party Transaction, Purchases from Related Party $ 370,260     $ 1,850,000 1,200,000      
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)             $ 1.59  
Milestone China [Member]                
Equity Method Investments               $ 1,000,000
Equity Method Investment, Ownership Percentage       40.00%       40.00%
Financing Receivable, after Allowance for Credit Loss, Total           $ 2,800,000    
Proceeds from Collection of Finance Receivables           $ 950,000    
Number of Medical Instruments Sold       100        
Revenue from Related Parties       $ 75,000        
Contract with Customer, Liability, Total       183,000        
Contract with Customer, Liability, Revenue Recognized         259,000      
Capitalized Contract Cost, Net, Total         104,000      
Due from Related Parties, Total       1,400,000        
Costs and Expenses, Related Party       $ 370,260        
Equity Method Investment, Deferred Intercompany Profit (Loss), Percentage       40.00%        
Income (Loss) from Equity Method Investments, Total       $ 97,887 81,324      
Equity Method Investments, Accumulated Loss         4,300,000      
Milestone China [Member] | Accounts Receivable from Related Parties [Member]                
Equity Method Investment, Deferred Intercompany Profit (Loss)       $ 243,000 $ 340,000      
Milestone Beijing [Member] | Milestone China [Member]                
Equity Method Investment, Ownership Percentage               75.00%
Anhui [Member]                
Equity Method Investment, Ownership Percentage       28.40%