Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Investment in and Transactions with Unconsolidated Subsidiaries (Details Textual)

v3.19.1
Note 6 - Investment in and Transactions with Unconsolidated Subsidiaries (Details Textual)
1 Months Ended 3 Months Ended 5 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Nov. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Accounts Receivable, Allowance for Credit Loss, Ending Balance $ 10,000   $ 10,000     $ 10,000
Income (Loss) from Equity Method Investments, Total     (9,564) $ 36,783    
Milestone China [Member]            
Equity Method Investments   $ 1,000,000 0      
Long-term Purchase Commitment, Minimum Quantity Required   772        
Equity Method Investment, Ownership Percentage   40.00%        
Financing Receivable, after Allowance for Credit Loss, Total 2,800,000         2,800,000
Account Receivables, Related Party, Monthly Payment         $ 200,000  
Accounts Receivable, Related Party, Balloon Payment to be Paid 1,425,000          
Proceeds from Collection of Finance Receivables     950,000      
Contract With Customer Liability Before Reserve Adjustment 1,800,000         1,800,000
Capitalized Contract Before Reserve Adjustment 1,250,000         1,250,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance     1,250,000      
Contract with Customer, Liability, Total 100,000   50,000     100,000
Capitalized Contract Cost, Net, Total 50,000   24,602     $ 50,000
Equity Method Investment, Deferred Intercompany Profit (Loss), Percentage           40.00%
Income (Loss) from Equity Method Investments, Total     9,564 $ 36,783    
Cost-method Investments, Realized Losses     3,984,177     $ 3,380,388
Milestone China [Member] | Accounts Receivable from Related Parties [Member]            
Equity Method Investment, Deferred Intercompany Profit (Loss) $ 421,800   $ 431,364     $ 421,800