Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Related Party Transactions (Details Textual)

v3.20.2
Note 13 - Related Party Transactions (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Apr. 29, 2020
Feb. 28, 2019
Jan. 31, 2017
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Jun. 30, 2014
Chief Executive Officer [Member]                  
Deferred Compensation Arrangement with Individual, Compensation Expense           $ 308,000   $ 380,000  
Director of Clinical Affairs [Member]                  
Royalty Expense       $ 61,000 $ 92,000 158,000 $ 292,000    
Professional Fees       39,000 39,000 117,000 117,000    
Accounts Payable, Related Parties       $ 80,000   $ 80,000   390,000  
Milestone China [Member]                  
Equity Method Investment, Ownership Percentage       40.00%   40.00%     40.00%
Manufacturing Agreement for Handpieces [Member]                  
Related Party Transaction, Purchases from Related Party $ 370,260     $ 373,000 549,000 $ 1,200,000 1,100,000    
Due to Related Parties, Total       365,000   365,000   $ 943,000  
Consulting Services [Member]                  
Related Party Transaction, Expenses from Transactions with Related Party       25,000 25,000 75,000 75,000    
Consulting Services [Member] | United Systems [Member]                  
Stock Issued During Period, Shares, Issued for Services (in shares)   285,714              
Shares Issued, Price Per Share (in dollars per share)   $ 0.35              
Stock Issued During Period, Value, Issued for Services   $ 100,000              
Consultant [Member] | Innovest S.p.A. [Member]                  
Related Party Transaction, Expenses from Transactions with Related Party       $ 20,000 $ 20,000 $ 60,000 $ 60,000    
Consulting Services Agreement, Term (Month)     1 year