Note 17 - Concentrations (Details Textual)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	5
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Largest Single Customer [Member]
Concentration Risk, Percentage	18.00%	21.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	45.00%	47.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Largest Single Customer [Member]
Concentration Risk, Percentage	33.00%	34.00%
Accounts Receivable [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Concentration Risk, Percentage	10.00%	26.00%
Manufacturing Costs Benchmark [Member] | Supplier Concentration Risk [Member]
Concentration Risk, Percentage	75.00%
Number of Major Vendors	1