Note 7 - Concentrations (Details Textual) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
---|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Jun. 30, 2017 |
|
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | |||||
Number of Major Customers | 2 | 2 | |||
Concentration Risk, Percentage | 92.00% | 85.00% | |||
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Four Customers [Member] | |||||
Number of Major Customers | 4 | ||||
Concentration Risk, Percentage | 69.00% | ||||
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Three Customers [Member] | |||||
Number of Major Customers | 3 | ||||
Concentration Risk, Percentage | 58.00% | ||||
Customer Concentration Risk [Member] | Accounts Receivable [Member] | |||||
Number of Major Customers | 2 | 5 | |||
Concentration Risk, Percentage | 91.00% | 91.00% | |||
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | |||||
Concentration Risk, Percentage | 65.00% | 54.00% | 57.00% | 60.00% | |
Number of Major Suppliers | 4 | 2 | 4 | 3 |