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Note H - Investment in Unconsolidated Subsidiaries (Details Textual)
1 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Mar. 02, 2018
USD ($)
May 31, 2017
Dec. 31, 2015
USD ($)
Income (Loss) from Equity Method Investments     $ (120,510) $ (795,827)      
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase     250,000      
Sales Revenue, Goods, Net     $ 11,281,886 10,482,005      
Advanced Ocular Sciences SA [Member]              
Equity Method Investment, Ownership Percentage     25.00%        
Advances to Affiliate             $ 78,798
Write-off of Advances to Affiliate       78,798      
Milestone China [Member]              
Equity Method Investment, Ownership Percentage   40.00%          
Equity Method Investments $ 0 $ 1,000,000 $ 0 0      
Long-term Purchase Commitment, Minimum Quantity Required   772          
Income (Loss) from Equity Method Investments     0 (795,827)      
Cost-method Investments, Realized Losses     3,147,470 1,124,350      
Equity Method Investment, Deferred Gain on Sale $ 1,400,000            
Sales Revenue, Goods, Net     $ 2,071,000 3,425,000      
Equity Method Investment, Deferred Intercompany Profit (Loss), Percentage     40.00%        
Milestone China [Member] | Accounts Receivable from Related Parties [Member]              
Equity Method Investment, Deferred Intercompany Profit (Loss)     $ 751,500 630,990      
Equity Method Investment, Unrealized Intercompany Profit (Loss) Not Eliminated, Amount     (120,510)        
Milestone China [Member] | Instruments and Handpieces [Member]              
Sales Revenue, Goods, Net     $ 2,071,000 3,425,000      
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member]              
Equity Method Investment, Ownership Percentage 40.00%         40.00%  
Option to Repurchase, Period 10 years            
Price for Shares of Variable Interest Entity Interest Sold $ 1,400,000            
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase 125,000            
Financing Receivable, Net 1,275,000            
Note Receivable, Quarterly Installment Amount 125,000            
Option to Repurchase Variable Interest Entity Shares, Purchase Price $ 1,400,000            
Option to Repurchase Variable Entity Shares at Specified Purchase Price, Period 2 years            
Equity Method Investment, Deferred Gain on Sale $ 1,400,000            
Variable Interest Entity Ownership Percentage Sold 40.00%            
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member] | Subsequent Event [Member] | Upon Exercise of Default Agreement [Member]              
Return Obligation, Amount         $ 250,000    
Milestone Education LLC [Member] | Accounts Receivable from Related Parties [Member]              
Equity Method Investment, Unrealized Intercompany Profit (Loss) Not Eliminated, Amount       $ 795,827