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Note F - Investment in and Transactions With Equity Investees (Details Textual)
¥ in Millions
12 Months Ended
Oct. 08, 2021
USD ($)
Oct. 08, 2021
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2014
USD ($)
Income (Loss) from Equity Method Investments     $ 0 $ 242,589    
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  
Income (Loss) from Equity Method Investments       (242,000)    
Milestone China [Member] | Accounts Receivable from Related Parties [Member]            
Equity Method Investment, Deferred Intercompany Profit (Loss)     0 0    
Milestone China [Member] | Instruments [Member]            
Revenue from Related Parties     630,000 2,100,000    
Contract with Customer, Liability, Total     $ 0 $ 89,000    
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