Annual report pursuant to Section 13 and 15(d)

Note D - Notes Receivable (Details Textual)

v3.19.1
Note D - Notes Receivable (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Mar. 02, 2018
Apr. 30, 2018
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2014
Proceeds from Sale of Variable Interest Entity Shares with Agreement to Repurchase       $ (250,000) $ 250,000  
Milestone China [Member]            
Equity Method Investment, Ownership Percentage           40.00%
Financing Receivable, Net, Total       $ 2,800,000    
Equity Method Investment, Deferred Gain on Sale     $ 1,400,000      
Milestone China [Member] | Sale of Variable Interest Entity's Shares [Member]            
Equity Method Investment, Ownership Percentage     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, Total     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      
Return Obligation, Amount Repaid $ 250,000          
Notes Receivable, Reversal Amount   $ 1,150,000        
Equity Method Investment, Reversal of Deferred Gain on Sale   1,400,000        
Termination Agreement, Gain (Loss) on Transaction   $ 0