• Filing Date: 2019-02-19
  • Form Type: 10-Q
  • Description: Quarterly report
v3.10.0.1
Note 4 - Concentrations (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Mar. 31, 2018
USD ($)
Revenue from Contract with Customer, Including Assessed Tax $ 739,538 $ 1,021,042 $ 2,351,201 $ 3,098,536  
Accounts Receivable, Net, Current, Total 1,249,237   1,249,237   $ 1,207,493
Foreign Customers [Member]          
Accounts Receivable, Net, Current, Total $ 38,999   $ 38,999   $ 39,995
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]          
Concentration Risk, Number of Customers 2 3 2 3  
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Two Customers [Member]          
Concentration Risk, Percentage 61.00%   56.00%    
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Foreign Customers [Member]          
Concentration Risk, Percentage 10.00% 9.00% 14.00% 8.00%  
Revenue from Contract with Customer, Including Assessed Tax $ 77,275 $ 92,967 $ 324,814 $ 251,825  
Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Concentration Risk, Number of Customers         2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Customers [Member]          
Concentration Risk, Percentage         93.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Three Customers [Member]          
Concentration Risk, Number of Customers     3    
Concentration Risk, Percentage   52.00% 99.00% 59.00%