Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Investment in and Transactions With Equity Investees (Details Textual)

v3.21.2
Note 6 - Investment in and Transactions With Equity Investees (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2020
Apr. 29, 2020
Jul. 31, 2020
May 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2018
Dec. 31, 2020
Apr. 23, 2020
Jun. 30, 2014
Income (Loss) from Equity Method Investments, Total         $ (95,857) $ 0 $ (94,556) $ 0        
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 $ 370,260     384,000 751,000            
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]                        
Revenue from Related Parties         525,000 0 1 0        
Contract with Customer, Liability, Total         178,000   178,000          
Milestone China [Member]                        
Equity Method Investments                       $ 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      
Due from Related Parties, Total                   $ 1,400,000    
Income (Loss) from Equity Method Investments, Total         $ 95,000 $ 95,000 $ 95,000 $ 95,000        
Milestone China [Member] | Accounts Receivable from Related Parties [Member]                        
Equity Method Investment, Deferred Intercompany Profit (Loss)                   243,000    
Milestone Beijing [Member] | Milestone China [Member]                        
Equity Method Investment, Ownership Percentage                       75.00%
Anhui [Member]                        
Equity Method Investments                   0    
Equity Method Investment, Ownership Percentage         28.40%   28.40%          
Equity Method Investments, Accumulated Loss                   $ 5,900,000